Reference Specimens
The Folch Collection

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Photos by Fabre Minerals. Under Creative Commons license

This page provides a selection of the specimensthat were in the Folch Collection that have passed through the Fabre Minerals website and, due to their quality,
rarity, or significance as specimens from interesting locations, have been preserved as reference specimens in #MVM
We hope that you enjoy your visit, even if it is just to see this page!

Carles Curto Text: Carles Curto (former Geology Museum, Barcelona curator) & Jordi Fabre
Assistance from John S. White (former Smithsonian curator) John S. White

 


The Folch Collection

The Folch Collection was known during the period 1960-1980 as one of the best private collections in the world. It was famous worldwide for its size (more than 15,000 specimens), the quality of the specimens, the large number of classic specimens which are now almost impossible to obtain, and the style of the collection, which is surprisingly 'modern'. Sr. Folch (Joaquín Folch Girona) collected during a period when the style of most collectors in Europe consisted of gathering large specimens of rare minerals, and in which esthetics and perfection were not that important. That said he actually tended to collect smaller specimens that were esthetic and, when possible, damage free. On the death of Sr. Folch, in 1984, the collection passed to his son Alberto, and when he in turn died it went to his grandson Joaquín Folch who wisely decided to keep the collection exactly as his grandfather had it (including the display cases). So the collection was kept together and its enormous historical value has not been lost.

While I was a teenager I had the luck to have been warmly invited by Sr. Folch to visit the collection. I made numerous visits, and with him beside me I obtained an enormous amount of mineralogical information which went far beyond what I would have learned anywhere else. Given this experience I have always had a strong connection with the collection.

During my ongoing contacts with the Folch family a moment arrived when they expressed their desire to update the collection so as to make it more current - since 1984 nothing new had been added so there was a significant gap in the minerals found since then. After lots of friendly and unhurried discussions the Folch family asked me to help them with this updating process. To do this we had the good fortune that the collection included many attractive duplicates. These duplicates do not add much to the Folch collection, as there are other examples of all of them, but given their unusual localities and/or high quality they still represent good commercial specimens.

So, for the first time, some of the duplicate specimens from the Folch Collection are emerging into the sunlight. Each one of them has hand written notes made by Sr. Folch himself as well as, in many cases, his personal label and number (in the case that they were part of the major collection). The duplicates will be sold during the shows that we normally attend, and also through our web site and store in Barcelona (you need to arrange a visit beforehand, which we will try to find a way of accommodating visitors)

This project will take us a long time, as the specimens available are numerous and neither the family nor I wish to make the choices too quickly. The idea is to work slowly and select the pieces in a very systematic and careful manner. We think that given the special characteristics of the specimens that will be available and their historical value this will be a great chance for many collectors to obtain pieces that would otherwise have remained pure dreams.

We hope that little by little we can satisfy all those that wish to acquire a duplicate from the Folch collection and we can assure them that this task will give us far more pleasure than simple economic benefits. Sr. Folch was my spiritual father in mineralogical terms so handling his minerals and helping to improve his collection with new purchases is a fantastic sensation for me because the profits gained from the sale of these duplicates are used to acquire more contemporary specimens, thus satisfying the family's desire to update the collection.

I cannot thank the Folch family enough for their good faith and for their wish to improve the collection. They are helped by the undeniable support and enthusiasm of Francisco Riquelme, the current conservator of the collection, and between them they have taken a step that many people have wished them to take and that will give great joy to collectors worldwide, as well as increasing interest in and knowledge of the Folch collection in Spain and the rest of the world.

 


1926: Mineralogical Society, Jubilee Celebration.
Sr. Folch is the third from the right in the first row on foot

 

 

 


Sr. Folch holding an Apatite from Panasqueira

 

 

 

 

Typical handwritten labels from the Folch Collection

 



Typical record from the Folch Collection

 


Massachusetts

Datolite
Datolite.
 

RD16M2: Very uncommon locality not well represented in collections. Group of well defined Datolite crystals, with a light green color and good luster for the species. The specimen was from the former Scott J. Williams collection and we’ll send this label, which contains some handwritten notes from Mr. Folch, to the buyer.
Hampden Quarry, West Springfield, Hampden County, Massachusetts  USA (±1961)

Specimen size: 4.4 × 3.8 × 3.6 cm = 1.73” × 1.50” × 1.42”

Main crystal size: 3.7 × 2 cm = 1.46” × 0.79”

With handwritten note from the Folch Collection (duplicates)

Michigan

Copper
 

RP56G0: In the group, the crystals show especially sharp crystal faces. The surface of the faces had resisted the passage of time and they are practically free of any alteration.
Lake Superior, Keweenaw County, Michigan  USA

Specimen size: 2.6 × 1.7 × 1.5 cm = 1.02” × 0.67” × 0.59”

With handwritten note from the Folch Collection (duplicates)
Copper.

Montana

Enargite with Pyrite
Enargite with Pyrite.
 

RE36G0: A classic specimen. Prisms of Enargite contrast with complex crystals of Pyrite showing clearly the octahedron and pyritohedron faces.
Folch purchased the specimen directly in Butte, Montana, in 1955.
Butte, Butte District, Silver Bow County, Montana  USA (±1955)

Specimen size: 3.2 × 3.1 × 2 cm = 1.26” × 1.22” × 0.79”

With handwritten note from the Folch Collection (duplicates)
Enargite with Pyrite
 

RT36G0: The prisms of Enargite, very bright, contrast with octahedral crystals of Pyrite with a modest development of pyritohedron faces.
Folch purchased the specimen directly in Butte, Montana, in 1955.
Butte, Butte District, Silver Bow County, Montana  USA (±1955)

Specimen size: 3.5 × 3.3 × 2 cm = 1.38” × 1.30” × 0.79”

With handwritten note & record from the Folch Collection (duplicates)
Enargite with Pyrite.
Enargite with Pyrite
Enargite with Pyrite.
 

RR14K9: Group of prismatic crystals with well defined faces and edges and good luster. On matrix with small octahedral Pyrite crystals.
Butte, Butte District, Silver Bow County, Montana  USA

Specimen size: 4.5 × 3.4 × 2.5 cm = 1.77” × 1.34” × 0.98”

Main crystal size: 1.0 × 1.0 cm = 0.39” × 0.39”

With handwritten note from the Folch Collection (duplicates)
Enargite with Pyrite and Quartz
 

RE27R6: A U.S. classic with sharp prismatic crystals of Enargite, bright and with excellent terminations. On matrix, with Pyrite and Quartz.
Butte, Butte District, Silver Bow County, Montana  USA

Specimen size: 6 × 5.2 × 3.4 cm = 2.36” × 2.05” × 1.34”

Main crystal size: 0.6 × 0.5 cm = 0.24” × 0.20”

With handwritten note from the Folch Collection (duplicates)
Enargite with Pyrite and Quartz. Enargite with Pyrite and Quartz.

Nevada

Olivenite with Pitticite
Olivenite with Pitticite.
Olivenite with Pitticite.
Olivenite with Pitticite  

RX92M0: Classic acicular olive green Olivenite crystals, very bright, and on a rocky matrix with Pitticite. This specimen is accompanied by a handwritten Folch label and the collection card (Nr. 7344).
Majuba Hill Mine, Antelope District, Pershing County, Nevada  USA (±1961)

Specimen size: 5.8 × 3.3 × 2.8 cm = 2.28” × 1.30” × 1.10”

Main crystal size: 0.4 × 0.1 cm = 0.16” × 0.04”

With handwritten note & record from the Folch Collection (duplicates)
Getchellite with Realgar and Orpiment
Getchellite with Realgar and Orpiment  

RQ61AE6: Masses of partial crystals and foliation surfaces of Getchellite that have a very intense vermillion color. They are on matrix with crystalline Realgar that has a more bloody red color, and with radial leafy Orpiment aggregates.
The sample is from the Joaquín Folch duplicates collection, whose label we’ll send to the buyer.
Getchell Mine, Adam Peak, Potosi District, Osgood Mountains, Humboldt County, Nevada  USA (±1976)

Specimen size: 6.8 × 5.8 × 4 cm = 2.68” × 2.28” × 1.57”

Type locality

With handwritten note from the Folch Collection (duplicates)
Getchellite with Realgar and Orpiment. Getchellite with Realgar and Orpiment.
Axinite-(Mn)
Axinite-(Mn).
Axinite-(Mn)  

RQ16M5: The crystal, from an uncommon locality, is on matrix and, even being poorly defined, it is of the species Axinite-(Mn), considerably less common than Axinite-(Fe).
The specimen is with a label from John S. Albanese, that will be sent to the buyer.
Luning area, Mineral County, Nevada  USA

Specimen size: 5.1 × 4.2 × 2.6 cm = 2.01” × 1.65” × 1.02”

With handwritten note from the Folch Collection (duplicates)

New Hampshire

Herderite
Herderite  

RE67F8: A rarity. The crystal, even though it is not well terminated on the rear, is well developed and is quite large for the locality, which in turn is a classic one for US mineralogy. It is a floater.
Rumney, Grafton County, New Hampshire  USA (±1967)

Specimen size: 3 × 2 × 1.5 cm = 1.18” × 0.79” × 0.59”

With handwritten note & record from the Folch Collection (duplicates)
Herderite.

New Jersey

Datolite with Quartz and Pectolite
Datolite with Quartz and Pectolite. Datolite with Quartz and Pectolite.
Datolite with Quartz and Pectolite  

RB64N4: Group of well defined, bright crystals of good color with fibrous aggregates of Pectolite on the back of the piece. It is from a classic American locality.
The sample is with the label of John S. Albanese, (Union, New Jersey) that we'll send to the buyer.
Woodland Park, Passaic County, New Jersey  USA

Specimen size: 4.2 × 3.9 × 2.2 cm = 1.65” × 1.54” × 0.87”

Main crystal size: 0.8 × 0.5 cm = 0.31” × 0.20”

With handwritten note from the Folch Collection (duplicates)
Datolite
Datolite  

RH63M2: Group of well defined Datolite crystals, very rich in faces, with a light green color and huge size for the locality, a classic for the species.
Woodland Park, Passaic County, New Jersey  USA

Specimen size: 5.4 × 3.7 × 2.1 cm = 2.13” × 1.46” × 0.83”

Main crystal size: 2.9 × 1.7 cm = 1.14” × 0.67”

With handwritten note from the Folch Collection (duplicates)
Datolite.
Datolite with Stilbite-Ca
Datolite with Stilbite-Ca. Datolite with Stilbite-Ca.
Datolite with Stilbite-Ca  

RM12AB7: Aggregates of short and flattened Datolite crystals with very well defined faces and edges. They are translucent, very bright, and with a pale green color and are on matrix and partially coated by small, white, laminar and clear Stilbite-Ca crystals. An American classic.
Paterson, Passaic County, New Jersey  USA

Specimen size: 7.2 × 7.2 × 3.9 cm = 2.83” × 2.83” × 1.54”

Main crystal size: 0.8 × 0.7 cm = 0.31” × 0.28”

With handwritten note from the Folch Collection (duplicates)
Datolite with Chalcopyrite
Datolite with Chalcopyrite  

RF56K0: Group of crystals with very sharp faces and edges of green color deeper than usual on the samples from this locality, classic for the species. On the surface of Datolite there are small crystals of Chalcopyrite.
Upper New Street Quarry, Paterson, Passaic County, New Jersey  USA (±1965)

Specimen size: 8.3 × 6.2 × 4.1 cm = 3.27” × 2.44” × 1.61”

Main crystal size: 1.8 × 1 cm = 0.71” × 0.39”

With handwritten note from the Folch Collection (duplicates)
Datolite with Chalcopyrite. Datolite with Chalcopyrite.
Rhodonite
Rhodonite.
Rhodonite.
Rhodonite  

RA26H7: Group of prismatic crystals of very well defined faces and edges and a good color, locally with octahedral crystals of Franklinite. Specimens like this are very hard to find.
Franklin, Franklin Mining District, Sussex County, New Jersey  USA (±1970)

Specimen size: 9.3 × 5 × 5.5 cm = 3.66” × 1.97” × 2.17”

Main crystal size: 2.9 × 0.8 cm = 1.14” × 0.31”

With record from the Folch Collection (duplicates)
Willemite (Troostite)
Willemite (Troostite)  

RM61N4: Very well defined, floater and doubly terminated crystal that has good color. An American classic.
Franklin, Franklin Mining District, Sussex County, New Jersey  USA

Specimen size: 2.5 × 2.2 × 1.6 cm = 0.98” × 0.87” × 0.63”

With handwritten note from the Folch Collection (duplicates)

Intense fluorescence short UV & fluorescent long UV
Willemite (Troostite).
Zincite with Franklinite and Willemite
Zincite with Franklinite and Willemite. Front
Front
Zincite with Franklinite and Willemite. Side
Side
Zincite with Franklinite and Willemite  

RQ14T8: Crystalline and nodular growths typical of the Zincite samples from Franklin. They have a very deep red color, are bright and are with octahedral crystals of Franklinite and with Willemite.
The sample is with a label from Siber+Siber with handwritten notes of Folch that we’ll send to the buyer.
Franklin, Franklin Mining District, Sussex County, New Jersey  USA (±1970)

Specimen size: 4.9 × 4.3 × 6 cm = 1.93” × 1.69” × 2.36”

With handwritten note from the Folch Collection (duplicates)

Willemite very fluorescent long & short UV

New Mexico

Hewettite on Gypsum
 

RJ36F8: A superb formation of fibrous crystals that have hints of gold and bronze and are on gypsum. Collected by Sr. Folch in October 1959.
Homestake Mine, Ambrosia Lake area, Grants District, McKinley County, New Mexico  USA (1959)

Specimen size: 4.4 × 4.1 × 1.9 cm = 1.73” × 1.61” × 0.75”

With handwritten note & record from the Folch Collection (duplicates)
Hewettite on Gypsum.
Linarite with Quartz
Linarite with Quartz. Front
Front
Linarite with Quartz. Rear detail
Rear detail
 

RF11M2: From one of the classic localities for the species. Concretions and small flattened crystals (in the vug on the back side of the specimen) with an intense and characteristic blue color, all on a Quartz matrix.
Bingham, Hansonburg District, Socorro County, New Mexico  USA (±1959)

Specimen size: 5.3 × 3.2 × 1.8 cm = 2.09” × 1.26” × 0.71”

Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”

With handwritten note from the Folch Collection (duplicates)

New York

Dravite
 

RH6F8: This one is really for specialists. One of the crystals of Dravite from St Lawrence County. The specimen is, obviously, not that appealing as not all the faces have grown fully. But it is part of mineralogical history.
The specimen has been photographed and published in the magazine ‘Paragénesis’, number 01/2020, page 60
St. Lawrence County, New York  USA (±1980)

Specimen size: 2 × 1.7 × 1.7 cm = 0.79” × 0.67” × 0.67”

With handwritten note from the Folch Collection (duplicates)

Fluorescent long & short UV
Dravite.
Uvite (Series)
Uvite (Series). Front
Front
Uvite (Series). Rear
Rear
Uvite (Series)  

RZ62M0: This crystal, from a classic locality from the New York state, is formed by a short prism and the terminal flattened rhombohedron faces, which are well defined and show a good luster. Although it looks damaged in two places, one of them is a natural hole with crystal faces inside. The other one effectively is a ding.
This specimen was bought by Mr. Folch in 1959 and it is accompanied by a handwritten label and the collection card (Nr. 5060)

Pierrepont, St. Lawrence County, New York  USA (±1959)

Specimen size: 3.8 × 3.5 × 3.2 cm = 1.50” × 1.38” × 1.26”

With handwritten note & record from the Folch Collection (duplicates)

North Carolina

Zircon
 

RT8N4: Small but very well defined and doubly terminated crystal, formed by the faces of the prism and of a dipyramid. We apologize for not offering more information about the locality. The original manuscript label simply indicates North Carolina.
-----  

Specimen size: 0.8 × 0.6 × 0.5 cm = 0.31” × 0.24” × 0.20”

With handwritten note from the Folch Collection (duplicates)

Intense fluorescence short UV & fluorescent long UV
Zircon.

Oklahoma

Sphalerite with Pyrite and Marcasite
Sphalerite with Pyrite and Marcasite.
Sphalerite with Pyrite and Marcasite. Sphalerite with Pyrite and Marcasite.
Sphalerite with Pyrite and Marcasite  

RX96P8: From a classic American locality. The Sphalerite crystals are complex with deep red color and good transparency. These crystals were named "Ruby Jack". They are implanted on a very thin matrix and are partially coated by sharp, well defined, crystals of Marcasite. Folch's records indicate that the sample was acquired in Tucson in 1959.
Picher Field, Tri-State District, Ottawa County, Oklahoma  USA (±1959)

Specimen size: 10.8 × 8.3 × 2.9 cm = 4.25” × 3.27” × 1.14”

Main crystal size: 3.6 × 2.9 cm = 1.42” × 1.14”

With handwritten note & record from the Folch Collection (duplicates)

MEXICO - CANADA


Mexico

Axinite-(Fe)
Axinite-(Fe)  

RA58N4: The locality, due to its rarity, is the most notable about this piece which has an excellent color.
With a label from Shale's (Los Angeles) that we'll send to the buyer.
Valle de la Trinidad, Municipio Ensenada, Baja California  Mexico

Specimen size: 5.7 × 3.5 × 1 cm = 2.24” × 1.38” × 0.39”

With handwritten note from the Folch Collection (duplicates)
Axinite-(Fe).
Vesuvianite
Vesuvianite.
 

RL10P8: The single crystal is better defined than usual for this classic Mexican locality. Its morphology, perfectly distinct, consists of two prisms and a dipyramid, incomplete in the lower part of the crystal.
Sierra de las Cruces, Sierra Mojada mining district, Municipio Sierra Mojada, Coahuila (Coahuila de Zaragoza)  Mexico (±1970)

Specimen size: 2.6 × 1.5 × 1.7 cm = 1.02” × 0.59” × 0.67”

With handwritten note from the Folch Collection (duplicates)
Vesuvianite
 

RK60M9: Floater and doubly terminated crystal of very well defined faces and edges. It is formed by two prisms 45 degrees to each other, and a dipyramid.
Sierra de las Cruces, Sierra Mojada mining district, Municipio Sierra Mojada, Coahuila (Coahuila de Zaragoza)  Mexico (±1970)

Specimen size: 2.9 × 2.1 × 1.9 cm = 1.14” × 0.83” × 0.75”

With handwritten note from the Folch Collection (duplicates)
Vesuvianite.
Doubly terminated Vesuvianite
Doubly terminated Vesuvianite.
 

RC63P8: A single equidimensional Vesuvianite crystal of yellowish brown color. Its cubical aspect is due to two short prisms and a dipyramid plus the terminal pinacoid. On the surface of some of its faces there are small groups of dodecahedral crystals of Grossular.
Sierra de las Cruces, Sierra Mojada mining district, Municipio Sierra Mojada, Coahuila (Coahuila de Zaragoza)  Mexico

Specimen size: 3.1 × 3 × 3.1 cm = 1.22” × 1.18” × 1.22”

With handwritten note from the Folch Collection (duplicates)
Vesuvianite with Grossular
 

RN16K9: A group of Vesuvianite crystals from a classic locality, with well defined faces and edges, most of them doubly terminated. They are formed by two prisms and a pyramid on the terminal faces.
Sierra de las Cruces, Sierra Mojada mining district, Municipio Sierra Mojada, Coahuila (Coahuila de Zaragoza)  Mexico (±1970)

Specimen size: 4.8 × 3.5 × 2.8 cm = 1.89” × 1.38” × 1.10”

Main crystal size: 2.8 × 1.6 cm = 1.10” × 0.63”

With handwritten note from the Folch Collection (duplicates)
Vesuvianite with Grossular. Front
Front
Vesuvianite with Grossular. Top
Top
Grossular
Grossular.
 

RK16G2: A group of dodecahedral crystals perfectly defined, with a good luster and a color quite different than usual for the Grossular from this locality.
Sierra de las Cruces, Sierra Mojada mining district, Municipio Sierra Mojada, Coahuila (Coahuila de Zaragoza)  Mexico

Specimen size: 3.1 × 3 × 2.9 cm = 1.22” × 1.18” × 1.14”

With handwritten note from the Folch Collection (duplicates)
Polybasite with Chalcopyrite and Quartz
Polybasite with Chalcopyrite and Quartz  

RD46H3: Group of very sharp laminar crystals with very marked triangular growth figures on the pinacoid faces. Chalcopyrite growths and small white crystals of Quartz enhance the esthetics of the specimen.
The specimen is accompanied by a Lidstrom’s label, and we will give the buyer also a copy of the analysis of the Polybasite.
Chihuahua  Mexico

Specimen size: 2.8 × 2.7 × 2.4 cm = 1.10” × 1.06” × 0.94”

With handwritten note from the Folch Collection (duplicates)
Polybasite with Chalcopyrite and Quartz. Front
Front
Polybasite with Chalcopyrite and Quartz. Top
Top
Pyrrhotite with Dolomite
Pyrrhotite with Dolomite.
Pyrrhotite with Dolomite.
Pyrrhotite with Dolomite  

RA46L9: Group of prismatic Pyrrhotite crystals with excellent terminations, partially covered by small Dolomite crystals.
The piece is accompanied by a handwritten label and a card (nr. 9812) from the Folch Collection, where we can read that it was purchased in 1966.
Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua  Mexico (1966)

Specimen size: 12.6 × 7.4 × 4.4 cm = 4.96” × 2.91” × 1.73”

Main crystal size: 1.5 × 1.4 cm = 0.59” × 0.55”

With handwritten note & record from the Folch Collection (duplicates)
Wulfenite with Dolomite
Wulfenite with Dolomite  

RH6M3: Two huge size Wulfenite crystals with a toasted honey color on the edges and yellow pinacoidal faces. With a small matrix.
This sample was purchased from John S. Albanese, of New Jersey.The piece is accompanied by a handwritten label with the notes from Mr. Folch.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico

Specimen size: 3.3 × 3.1 × 2.4 cm = 1.30” × 1.22” × 0.94”

Main crystal size: 2.9 × 2.9 cm = 1.14” × 1.14”

With handwritten note from the Folch Collection (duplicates)
Wulfenite with Dolomite.
Wulfenite with Calcite
Wulfenite with Calcite. Front
Front
Wulfenite with Calcite. Rear
Rear
Wulfenite with Calcite. Top
Top
 

RJ46H8: The crystal is very thick, almost prismatic, and has very well-defined faces and edges. Its color is very good and the aerial position of the crystal on the matrix make the sample very esthetic.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico (1960)

Specimen size: 4.5 × 4.3 × 4 cm = 1.77” × 1.69” × 1.57”

Main crystal size: 1.1 × 0.8 cm = 0.43” × 0.31”

With handwritten note from the Folch Collection (duplicates)
Wulfenite
Wulfenite  

RX96F8: The crystals, with perfect color and brilliance, have a elongated form that is not common among examples from Los Lamentos.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico

Specimen size: 6.3 × 4.7 × 4 cm = 2.48” × 1.85” × 1.57”

Main crystal size: 0.6 × 0.3 cm = 0.24” × 0.12”

With handwritten note from the Folch Collection (duplicates)
Wulfenite. Wulfenite.
Wulfenite
Wulfenite. Wulfenite.
 

RX37J1: Group of bipyramidal acute crystals, much of them doubly terminated, very well defined and with intense deep orange color. Although the locality on original the label is Tiger, we authenticated the specimen as coming from Los Lamentos, so we give this last locality as correct.
We will send the label of the sample, from the Ernest Windisch collection (World Wide Minerals), Philipsburg, Québec, to the buyer.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico

Specimen size: 7.3 × 4.4 × 3.5 cm = 2.87” × 1.73” × 1.38”

Main crystal size: 0.8 × 0.3 cm = 0.31” × 0.12”

With handwritten note from the Folch Collection (duplicates)
Wulfenite with Calcite
 

RQ86S7: Prismatic crystals quite more elongated than usual on the samples from Los Lamentos, with neat pinacoidal terminations, very bright and an orange color with darker areas in the center of the prism. With Calcite and on matrix.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico (±1964)

Specimen size: 10.1 × 6.7 × 2 cm = 3.98” × 2.64” × 0.79”

Main crystal size: 1.1 × 0.5 cm = 0.43” × 0.20”

With handwritten note from the Folch Collection (duplicates)

Calcite fluorescent long & short UV
Wulfenite with Calcite. Wulfenite with Calcite.
Wulfenite with Calcite
Wulfenite with Calcite.
Wulfenite with Calcite.
Wulfenite with Calcite  

RH94M9: Group of thick tabular crystals that have very well defined faces and edges, excellent luster and a very deep orange color. On Limonite matrix.
The specimen is accompanied by a Lidstrom’s label.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico (±1968)

Specimen size: 10.8 × 7.8 × 4.5 cm = 4.25” × 3.07” × 1.77”

Main crystal size: 0.9 × 0.8 cm = 0.35” × 0.31”

With handwritten note from the Folch Collection (duplicates)

Calcite fluorescent long & short UV
Wulfenite with Calcite
Wulfenite with Calcite  

RC52H3: Group of tabular crystals very sharp, with excellent color and luster and contrasting with a white matrix.
We offer a label of the first supplier, Barney Goff, from New Hope, with autographed notes of Sr. Folch.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico (±1973)

Specimen size: 11 × 7 × 4 cm = 4.33” × 2.76” × 1.57”

Main crystal size: 1.3 × 1.3 cm = 0.51” × 0.51”

With handwritten note from the Folch Collection (duplicates)

Calcite fluorescent long & short UV
Wulfenite with Calcite. Wulfenite with Calcite.
Wulfenite with Vanadinite (variety endlichite)
Wulfenite with Vanadinite (variety endlichite). Front
Front
Wulfenite with Vanadinite (variety endlichite). Side
Side
Wulfenite with Vanadinite (variety endlichite). <br>

 

RA16H9: On this sample, a classic, we specially note the quantity of tabular crystals, their color and that they are free of damage. The coverage of the matrix is a surface of small crystals of Endlichite a highly arsenical variety of Vanadinite.
Erupción Mine (Ahumada Mine), Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua  Mexico

Specimen size: 12 × 8.5 × 9.5 cm = 4.72” × 3.35” × 3.74”

Main crystal size: 1.4 × 1.3 cm = 0.55” × 0.51”

With handwritten note from the Folch Collection (duplicates)
Vanadinite with Calcite
Vanadinite with Calcite  

RJ14V5: Prismatic crystals with very well defined faces and edges, most of them doubly terminated, a clear cream color, on a druse of rhombohedral crystals of Calcite.
The sample is with a label and the collection card that we'll send to the buyer.
Mina San Carlos (Mina Apex), San Carlos, Manuel Benavides, Chihuahua  Mexico (±1955)

Specimen size: 7.8 × 6.7 × 3.3 cm = 3.07” × 2.64” × 1.30”

Main crystal size: 0.4 × 0.2 cm = 0.16” × 0.08”

With handwritten note & record from the Folch Collection (duplicates)
Vanadinite with Calcite. Vanadinite with Calcite.
Vanadinite with Calcite
Vanadinite with Calcite. Vanadinite with Calcite.
Vanadinite with Calcite  

RR27S7: Spindled prismatic crystals of Vanadinite. They are very acute and most of them have hollowed growths, their color is reddish brown and they are with Calcite on matrix. It is an historical sample, that comes from the Elbert Barron collection, as is shown on the original label and collection card, and it was purchased by Folch at El Paso, in 1959.
Mina San Carlos (Mina Apex), San Carlos, Manuel Benavides, Chihuahua  Mexico (±1959)

Specimen size: 8.2 × 6.2 × 5.2 cm = 3.23” × 2.44” × 2.05”

Main crystal size: 0.4 × 0.2 cm = 0.16” × 0.08”

With handwritten note & record from the Folch Collection (duplicates)

Calcite minor fluorescence long & short UV
Silver with Calcite
 

RE27G0: An esthetic specimen, very aerial, in which are some crystals are elongated and some of them show the twin plane clearly, in a Calcite matrix.
Sr. Folch purchased the specimen in 1962, but, as documentation explains, it was probably mined around 1910.
Batopilas, Andrés del Río District, Municipio Batopilas, Chihuahua  Mexico (±1910)

Specimen size: 5.9 × 3.5 × 3.3 cm = 2.32” × 1.38” × 1.30”

Main crystal size: 1.7 × 0.2 cm = 0.67” × 0.08”

With handwritten note & record from the Folch Collection (duplicates)

Calcite fluorescent long & short UV
Silver with Calcite. Front
Front
Silver with Calcite. Rear
Rear
Silver with Calcite.
Adamite
Adamite.
Adamite  

RB63P8: "Bow tie" growth of elongated crystals with clear color zoning, white at the center and a beautiful yellow elsewhere. The sample has an extraordinary fluorescence, very much stronger than usual.
Ojuela Mine, Mapimí, Municipio Mapimí, Durango  Mexico

Specimen size: 4.3 × 2.5 × 3.4 cm = 1.69” × 0.98” × 1.34”

With handwritten note from the Folch Collection (duplicates)

Extremely fluorescent long & short UV
Adamite
 

RD76H7: The color and the esthetics of the specimen are very good. Crystals, small and very bright, form spheroidal growths on a matrix of Limonite.
Mapimí, Municipio Mapimí, Durango  Mexico

Specimen size: 4.7 × 4.2 × 3.2 cm = 1.85” × 1.65” × 1.26”

With record from the Folch Collection (duplicates)

Extremely fluorescent long & short UV
Adamite. Front
Front
Adamite. Side
Side
Adamite on Limonite
Adamite on Limonite. Adamite on Limonite.
Adamite on Limonite  

RV13L9: Group of well defined and very bright Adamite crystals. A gentle yellow to greenish color, on a Limonite matrix.
The specimen is with a commercial label of John S. Albanese, from New Jersey. We will send the label to the buyer.
Ojuela Mine, Mapimí, Municipio Mapimí, Durango  Mexico

Specimen size: 4.8 × 3.5 × 2.8 cm = 1.89” × 1.38” × 1.10”

Main crystal size: 0.6 × 0.5 cm = 0.24” × 0.20”

With handwritten note from the Folch Collection (duplicates)

Very fluorescent long & short UV
Adamite
 

RT36H0: A pleasant group of crystals of excellent color and luster and completely undamaged, on the Limonite matrix typical of Mapimí specimens.
Mapimí, Municipio Mapimí, Durango  Mexico

Specimen size: 5 × 3.5 × 3.7 cm = 1.97” × 1.38” × 1.46”

With handwritten note from the Folch Collection (duplicates)

Extremely fluorescent long & short UV
Adamite.
Adamite (variety manganoan)
Adamite (variety manganoan). Adamite (variety manganoan).
Adamite (variety manganoan)  

RA14V1: The crystals are more isolated than usual for samples from Mapimí. They are on limonite matrix and have a very intense color and luster (but with a little bit less contrast than in the photo).
The sample is with a card from the Folch collection (number 13015) that we'll send to the buyer.
Ojuela Mine, Mapimí, Municipio Mapimí, Durango  Mexico (±1980)

Specimen size: 9.3 × 6.2 × 5.2 cm = 3.66” × 2.44” × 2.05”

Main crystal size: 0.4 × 0.3 cm = 0.16” × 0.12”

With handwritten note & record from the Folch Collection (duplicates)

Minor fluorescence long & short UV
Fluorapatite
 

RD56F8: A classic crystal with excellent color and transparency, and on matrix. Folch bought it in Cerro del Mercado, Durango, in September 1956.
Mina Cerro de Mercado, Cerro de los Remedios, Victoria de Durango, Municipio de Durango, Durango  Mexico (1956)

Specimen size: 4.7 × 3.6 × 3.2 cm = 1.85” × 1.42” × 1.26”

Main crystal size: 2.2 × 1.1 cm = 0.87” × 0.43”

With handwritten note & record from the Folch Collection (duplicates)

Fluorescent long & short UV
Fluorapatite.
Mimetite with Calcite
Mimetite with Calcite.
 

RK63J1: Prismatic crystals with very acute pyramidal terminations. Faces and edges are very well defined and the transparency, luster and color (deep yellow) are notable on a matrix of small crystals of pinkish Calcite.
Velardeña Distrito, Durango  Mexico

Specimen size: 4.3 × 3.6 × 1.7 cm = 1.69” × 1.42” × 0.67”

Main crystal size: 0.8 × 0.2 cm = 0.31” × 0.08”

With handwritten note from the Folch Collection (duplicates)

Calcite minor fluorescence long & short UV
Quartz (variety amethyst)
 

FK46K0: Classic group of crystals from this locality, in this case very transparent and with an excellent color, on a small matrix. The sample is very esthetic.
Piedra Parada (Las Vigas), Municipio Tatatila, Veracruz (Veracruz de Ignacio de la Llave)  Mexico

Specimen size: 5.3 × 4.5 × 4.2 cm = 2.09” × 1.77” × 1.65”

Main crystal size: 3.6 × 1.2 cm = 1.42” × 0.47”

With handwritten note from the Folch Collection (duplicates)
Quartz (variety amethyst).
Quartz (variety amethyst) with Quartz and Epidote
Quartz (variety amethyst) with Quartz and Epidote. Front
Front
Quartz (variety amethyst) with Quartz and Epidote. Rear
Rear
Quartz (variety amethyst) with Quartz and Epidote  

RC86V0: Group on matrix of transparent crystals with good size, color and luster. With color zoning, more concentrated on the terminations. Surely one of the first known samples from Las Vigas, as the old label of Lidstrom’s indicates. It reflects the uncertainty of the locality at the time because the original label says “Guerrero” , with a later correction of Folch, that locates the sample properly in Veracruz. We’ll send the Lidstrom's label to the buyer of the specimen.
Piedra Parada (Las Vigas), Municipio Tatatila, Veracruz (Veracruz de Ignacio de la Llave)  Mexico (±1969)

Specimen size: 7.6 × 6.8 × 3.7 cm = 2.99” × 2.68” × 1.46”

Main crystal size: 4 × 1.7 cm = 1.57” × 0.67”

With handwritten note from the Folch Collection (duplicates)
Quartz (variety amethyst)
 

RC99P8: Probably this is one of the first amethyst samples from Las Vigas because the original label indicates that it was acquired in Tucson in 1968 and (erroneously) 'Guerrero' as the locality. It is a very aerial group of crystals, some of them doubly terminated, with a very well marked color zoning. Luster and transparency are excellent.
Piedra Parada (Las Vigas), Municipio Tatatila, Veracruz (Veracruz de Ignacio de la Llave)  Mexico (±1968)

Specimen size: 9 × 5.7 × 2.9 cm = 3.54” × 2.24” × 1.14”

Main crystal size: 2.4 × 1.2 cm = 0.94” × 0.47”

With handwritten note from the Folch Collection (duplicates)
Quartz (variety amethyst). Quartz (variety amethyst).
Calcite on Quartz
Calcite on Quartz.
 

RR46G0: Excellent representation of Calcite from Guanajuato. The specimen is especially esthetic due to the aerial position of flat rhombohedral crystals, with a lenticular habit, on a matrix of lightly violet Quartz.
Guanajuato, Guanajuato  Mexico (±1967)

Specimen size: 5.7 × 5.3 × 3.6 cm = 2.24” × 2.09” × 1.42”

Main crystal size: 3.3 × 3.1 cm = 1.30” × 1.22”

With handwritten note & record from the Folch Collection (duplicates)

Calcite very fluorescent long & short UV
Clinozoisite with Quartz and Garnet
Clinozoisite with Quartz and Garnet  

RF6T5: Radial aggregates of acicular crystals with intense pink color, a shade that is well known but uncommon for the species. They are on a matrix with Quartz and garnet (probably Grossular).
The sample is with its Folch collection card and the Burminco (George Burnham) label that we'll send to the buyer.
Álamos, Municipio de Álamos, Sonora  Mexico

Specimen size: 7.4 × 5.5 × 4 cm = 2.91” × 2.17” × 1.57”

With handwritten note & record from the Folch Collection (duplicates)
Clinozoisite with Quartz and Garnet. Clinozoisite with Quartz and Garnet.
Tellurite with Quartz
Tellurite with Quartz.
Tellurite with Quartz  

TK26J1: Excellent miniature of this rare tellurium oxide. It is in groups of deep yellow acicular crystals in vugs on a Quartz matrix.
We will send the label of the sample, from Scott Williams Mineral Company, Scottsdale, Arizona, to the buyer.
Moctezuma Mine, Moctezuma, Sonora  Mexico

Specimen size: 2.9 × 3.1 × 2.4 cm = 1.14” × 1.22” × 0.94”

Main crystal size: 0.2 × 0.2 cm = 0.08” × 0.08”

With handwritten note from the Folch Collection (duplicates)
Smithsonite
Smithsonite  

RD76V5: Botryoidal aggregate with intense and deep pink-mauve color and good luster. It is coating a rocky matrix.
The sample is with a label and the collection card that we'll send to the buyer.
Mina La Suerte, Choix, Sinaloa  Mexico (±1972)

Specimen size: 7.8 × 7.1 × 2.4 cm = 3.07” × 2.80” × 0.94”

With handwritten note & record from the Folch Collection (duplicates)
Smithsonite. Smithsonite.
Stibiconite
Stibiconite. Front
Front
Stibiconite. Rear
Rear
Stibiconite. Top
Top
 

RE27S7: A Stibiconite pseudomorph after a Stibnite crystal, whose faces and edges are quite better defined than usual on the samples from Real de Catorce, and it has a more “fresh”, less rough, appearance than usual.
Real de Catorce (Catorce), Catorce Mountains, Municipio Catorce, San Luis Potosí  Mexico

Specimen size: 14.8 × 2.5 × 1.8 cm = 5.83” × 0.98” × 0.71”

With handwritten note from the Folch Collection (duplicates)

Minor fluorescence long & short UV

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