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Mineral Specimens - page 18
The Folch Collection

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Carles Curto Text: Carles Curto (curator of the Geology Museum, Barcelona ) & 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 pieces, 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 i 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, where possible, damage free. On the death of Sr. Folch, in 1984, the collection passed to his son Alberto, and when he in turn died 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, and still rather young, 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 suggested the idea of updating the collection so as to make it more up to date - since 1984 nothing new has been added and a significant gap in the minerals found since then has developed. After lots of friendly, unhurried discussions the Folch family asked me to help them with this updating process. To do this we have the luck that the collection includes 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 or simple high quality they are still good commercial specimens.

So, for the first time, the duplicate specimens from the Folch Collection will emerge into the sunlight. Each one of them has hand written notes made by Sr. Folch himself as well as, in many cases, his official label and number (in the case that they were part of the official 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).

This project will take us a long time, as the pieces 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.

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 collectors worldwide great joy, as well as increasing interest in and knowledge of the Folch collection within 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

 

Link to sold specimens from the Folch Collection 

USA


Arizona

Copper
Copper.

RL64L9: A miniature from a classic locality. Arborescent growth of Copper crystals, some of them well defined.
The piece is accompanied by a handwritten label from the Folch collection that we will send to the buyer.
Bisbee, Warren District, Cochise County, Arizona  USA

Specimen size: 3.5 × 2.4 × 2.3 cm

With handwritten note from the Folch Collection

Fluorescent short UV

Order
Cuprite (Chalcotrichite) with Copper

RC6K4: Fibrous aggregates of excellent luster and very intense red color on laminar growths of native Copper on matrix.
Ajo, Pima County, Arizona  USA (±1973)

Specimen size: 7.7 × 6 × 5 cm

With handwritten note from the Folch Collection


Cuprite (Chalcotrichite) with Copper. Cuprite (Chalcotrichite) with Copper.
Order
Cuprite (Chalcotrichite) with Copper
Cuprite (Chalcotrichite) with Copper. Front
Front
Cuprite (Chalcotrichite) with Copper. Rear
Rear
Cuprite (Chalcotrichite) with Copper.
Cuprite (Chalcotrichite) with Copper

RH47K8: Small but numerous groups of fibrous Cuprite crystals (Chalcotrichite), very bright and vivid red in color, on laminar growths of native Copper on matrix. The locality, a classic for Chalcotrichite (and for native Copper), makes this specimen even more interesting.
Ray Mine, Ray District, Pinal County, Arizona  USA (±1971)

Specimen size: 12.2 × 7.4 × 4 cm

With handwritten note from the Folch Collection


Sold
Copper

RD47K4: Arborescent growth of crystals very much better defined than usual in this kind of sample, perfectly conserved. On the back of the Schneider's label that is with the specimen is written the year 1969.
New Cornelia Pit, Ajo, Pima County, Arizona  USA (±1969)

Specimen size: 9.3 × 3.3 × 2.4 cm

Main crystal size: 0.5 × 0.5 cm

With handwritten note from the Folch Collection

Opal? intense fluorescence short UV & fluorescent long UV

Copper. Front
Front
Copper. Rear
Rear
Copper.
Order
Copper
Copper. Copper.

RB27I2: Dendritic growth of crystals, some of them very well defined, bright and with small coverage of Quartz.
Ray Mine, Ray District, Pinal County, Arizona  USA

Specimen size: 13.8 × 9.5 × 3 cm

Main crystal size: 2.1 × 0.8 cm

With handwritten note from the Folch Collection


Order
Wulfenite with Mimetite
Wulfenite with Mimetite

RJ38H0: A group of laminar crystals of intense orange-yellow color, very bright and partially covered by orange Mimetite. The mine is now an American classic. The piece has an important “pedigree” because it has a label showing a double provenance: The Scott J. Williams collection, of Arizona, and the C.J. Hansen collection where the piece was originally.
Mammoth-St. Anthony Mine, Tiger, Pinal County, Arizona  USA (±1957)

Specimen size: 7.2 × 6.3 × 3.8 cm

Main crystal size: 1.3 × 1.2 cm

With handwritten note from the Folch Collection


Wulfenite with Mimetite. Front
Front
Wulfenite with Mimetite. Rear
Rear
Order

California

Rutile
Rutile.

TX10I8: Prismatic crystal with very well-defined faces and edges. It has translucent reddish zones. The crystal is partially covered by matrix.
Champion Mine, Laws, White Mountains, Mono County, California  USA (±1959)

Specimen size: 1.7 × 1.3 × 1.4 cm

With handwritten note from the Folch Collection


Sold
Inesite
Inesite

RP49J1: Specimen of good color and good crystallization from this locality, classic for Inesite.
We will send the label of the sample, from Lidstrom’s, Prineville, Oregon, to the buyer.
Hale Creek, Trinity County, California  USA (±1973)

Specimen size: 6.8 × 5.8 × 3.4 cm

Main crystal size: 1.5 × 0.8 cm

With handwritten note from the Folch Collection


Inesite.
Inesite.
Sold

Colorado

Microcline (Amazonite) "Whitecap"
Microcline (Amazonite) "Whitecap". Front
Front
Microcline (Amazonite) "Whitecap". Top
Top
Microcline (Amazonite) "Whitecap"

RL27K9: Amazonite crystal with a second crystallization phase, known as “whitecap” (or white termination), the top side of the Amazonite is this color.
Pikes Peak. El Paso County, Colorado  USA (±1964)

Specimen size: 8.1 × 5.9 × 3.3 cm

With handwritten note & record from the Folch Collection


Order
Rhodochrosite on Quartz

RB97F9: Spheroidal aggregates of lenticular crystals with an intense pink color, contrast with the white Quartz matrix. The Color and brightness are better than usual in the samples from this historical mine.
American Tunnel Mine, Howardsville, Silverton, Colorado  USA

Specimen size: 5 × 3.3 × 2 cm

Main crystal size: 1.2 × 1.1 cm

With handwritten note & record from the Folch Collection


Rhodochrosite on Quartz.
Rhodochrosite on Quartz.
Sold
Rhodochrosite with Quartz
Rhodochrosite with Quartz.

RE87H0: A nice group of lenticular crystals with scaled surface, very typical of the historic find in the American Tunnel mine. They are partially covered by micro-crystals of Quartz and their color and luster are magnificent.
American Tunnel, Howardsville, Silverton, Colorado  USA (±1966)

Specimen size: 2.8 × 2.6 × 1.9 cm

Main crystal size: 1.2 × 0.6 cm

With handwritten note from the Folch Collection


Order
Hummerite
Hummerite

RK64J1: The specimen, from the type locality, is very representative of this rare vanadate. It forms deep orange microcrystals on matrix.
We will send the label of the sample, from Minerals Unlimited, Berkeley, California, to the buyer.
Hummer Mine, Paradox Valley, Montrose County, Colorado  USA (±1959)

Specimen size: 4.6 × 4.6 × 2.2 cm

With handwritten note from the Folch Collection


Hummerite.
Sold

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, Silver Bow County, Montana  USA

Specimen size: 4.5 × 3.4 × 2.5 cm

Main crystal size: 1.0 × 1.0 cm

With handwritten note from the Folch Collection


Order
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.
New Street Quarry, W. Peterson, Passaic County, New Jersey  USA (±1965)

Specimen size: 8.3 × 6.2 × 4.1 cm

Main crystal size: 1.8 × 1 cm

With handwritten note from the Folch Collection


Datolite with Chalcopyrite. Datolite with Chalcopyrite.
Sold
Dravite
Dravite.

RH6F8: This one is really for specialists. One of the few crystals of Elbaite 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.
St. Lawrence County, New York  USA (±1980)

Specimen size: 2 × 1.7 × 1.7 cm

With handwritten note from the Folch Collection

Fluorescent long & short UV

Order

MEXICO - CANADA


Mexico

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.
Mina Ojuela, Mapimí, Municipio de Mapimí, Durango  Mexico

Specimen size: 4.8 × 3.5 × 2.8 cm

Main crystal size: 0.6 × 0.5 cm

With handwritten note from the Folch Collection

Very fluorescent long & short UV

Adamite on Limonite. Adamite on Limonite.
Order
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, Chihuahua  Mexico (1966)

Specimen size: 12.6 × 7.4 × 4.4 cm

Main crystal size: 1.5 × 1.4 cm

With handwritten note & record from the Folch Collection


Euro:135 / US$214 / Yen:22760
Reservado
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.
Lago de Jaco, Sierra de la Cruz, Coahuila  Mexico (±1970)

Specimen size: 4.8 × 3.5 × 2.8 cm

Main crystal size: 2.8 × 1.6 cm

With handwritten note from the Folch Collection


Vesuvianite with Grossular. Front
Front
Vesuvianite with Grossular. Top
Top
Order
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.
Lago de Jaco, Coahuila  Mexico

Specimen size: 3.1 × 3 × 2.9 cm

With handwritten note from the Folch Collection


Order
Quartz (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.
Las Vigas, Veracruz  Mexico

Specimen size: 5.3 × 4.5 × 4.2 cm

Main crystal size: 3.6 × 1.2 cm

With handwritten note from the Folch Collection


Quartz (Amethyst).
Sold
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

Main crystal size: 0.8 × 0.2 cm

With handwritten note from the Folch Collection

Calcite minor fluorescence long & short UV

Order
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

Main crystal size: 0.2 × 0.2 cm

With handwritten note from the Folch Collection


Tellurite with Quartz.
Sold
Wulfenite with arsenical Vanadinite (Endlichite)
Wulfenite with arsenical Vanadinite (Endlichite). Front
Front
Wulfenite with arsenical Vanadinite (Endlichite). Side
Side
Wulfenite with arsenical Vanadinite (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.
Sierra de Los Lamentos, Ahumada, Chihuahua  Mexico

Specimen size: 12 × 8.5 × 9.5 cm

Main crystal size: 1.4 × 1.3 cm

With handwritten note from the Folch Collection


Sold

SPAIN


Topaz

RF16L9: Topaz crystal with good color and transparence from a Spanish locality that has became a classic. Well defined faces and edges, with thin vertical striations.
The piece is accompanied by a handwritten label from the Folch collection that we will send to the buyer.
Mina San Nicolás, Valle de la Serena, Badajoz  Spain (±1976)

Specimen size: 2.1 × 2 × 1.5 cm

With handwritten note from the Folch Collection


Euro:110 / US$174 / Yen:18540
Topaz.
Reservado
Cinnabar with Barite
Cinnabar with Barite.
Cinnabar with Barite.

RV6L9: Group of Cinnabar crystals with well defined faces and edges, with a honey-colored Barite crystal (that we have analyzed) on a black quartzite matrix and grey Quartz.
The piece is accompanied by a handwritten label from the Folch collection.
Mina de Almadén, Almadén, Ciudad Real  Spain (±1973)

Specimen size: 5 × 3.8 × 3.3 cm

Main crystal size: 0.6 × 0.3 cm

With handwritten note from the Folch Collection


Order
Cinnabar with Quartz

RV7I2: The crystal has a considerable size for the locality and it has very well defined faces and edges, on matrix and with small Quartz crystals. A classic.
Mina Almadén, Almadén, Ciudad Real  Spain (±1980)

Specimen size: 5.8 × 5 × 3.3 cm

Main crystal size: 0.6 × 0.6 cm

With handwritten note from the Folch Collection


Cinnabar with Quartz. Cinnabar with Quartz.
Order
Sphalerite
Sphalerite.

RF86L9: Very sharp Sphalerite crystal with some curved edges. A translucent sample with a good honey to red intense color.
The piece is accompanied by a handwritten label from the Folch collection.
Mina Las Mánforas, Áliva, Picos de Europa, Cantabria  Spain

Specimen size: 7.3 × 6 × 3 cm

With handwritten note from the Folch Collection


Order
Doubly terminated Calcite with Sphalerite

RF64L3: Calcite crystal, with a small but aerial Sphalerite crystal, not well defined but complete. Calcite from this mine is not common in this well defined shape.
Las Mánforas Mine, Áliva, Picos de Europa, Cantabria  Spain (±1975)

Specimen size: 5.7 × 4.1 × 3 cm

Main crystal size: 1 × 0.7 cm

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Doubly terminated Calcite with Sphalerite.
Doubly terminated Calcite with Sphalerite.
Sold
Cassiterite
Cassiterite.

RJ6G6: The locality is really unusual for crystallized Cassiterite. Crystal shows well-shaped faces of the pyramid and, less defined, the faces of the prism. The base, very rough, is a contact.
Cerro Cobatillas, Cardeña, Córdoba  Spain

Specimen size: 1.5 × 1.4 × 1.1 cm

With handwritten note from the Folch Collection


Order
Cassiterite

RH26H0: One of the frequent rarities that Folch’s collection contained, in this case for its locality. The crystal is a floater, with very sharp faces and edges with a little coverage of Mica.
Cerro Cobatillas, Cardeña, Córdoba  Spain

Specimen size: 1.7 × 1.5 × 1.1 cm

With handwritten note from the Folch Collection


Euro:120 / US$190 / Yen:20230
Cassiterite.
Reservado
Cassiterite with Scheelite
Cassiterite with Scheelite. Cassiterite with Scheelite.

RZ6G2: The locality is very poorly-known and well crystallized samples are very scarce. In this specimen, Cassiterite forms a perfectly defined elbow twin, in a matrix very rich with Scheelite.
Montoro, Córdoba  Spain

Specimen size: 4 × 2.8 × 2.3 cm

Main crystal size: 0.8 × 0.6 cm

With handwritten note from the Folch Collection

Scheelite extremely fluorescent long & short UV

Sold
Twinned Orthoclase

FD9K0: Floater crystal, complete and doubly terminated, that forms a very well defined Carlsbad twin.
Zarzalejo, Madrid  Spain

Specimen size: 3.9 × 3 × 1.6 cm

With handwritten note from the Folch Collection


Twinned Orthoclase. Front
Front
Twinned Orthoclase. Rear
Rear
Order
Tyrolite with Chrysocolla and Azurite
Tyrolite with Chrysocolla and Azurite. Tyrolite with Chrysocolla and Azurite.

FT6K0: Leafy groups of laminar crystals on matrix, with Chrysocolla and vugs of small crystals of Azurite.
Mina Delfina, Ortiguero, Cabrales, Asturias  Spain (1981)

Specimen size: 7.9 × 6.2 × 5 cm

Main crystal size: 0.8 × 0.4 cm

With handwritten note from the Folch Collection


Sold
Pyrargyrite on Quartz

RF57K9: Well developed small crystal group with little recrystallizations on the face’s surface. On a white Quartz matrix.
Hiendelaencina, Guadalajara  Spain

Specimen size: 2.0 × 1.1 × 1.0 cm

Main crystal size: 0.6 × 0.6 cm

With handwritten note from the Folch Collection


Pyrargyrite on Quartz.
Sold
Pyromorphite
Pyromorphite.

RG48F9: An aerial and esthetical group with dramatic color zoning near the top. The crystals are large and have a few common characteristics of the Horcajo specimens. The tips, even considering a beginning of cone growth, are perfectly flat. Another historical sample, with a lot of years on its back, when Sr. Folch purchased it in 1923 from a miner at the locality.
El Horcajo, Ciudad Real  Spain (1923)

Specimen size: 3 × 2.3 × 1.7 cm

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

Sold
Bismuth

RA76H9: A good sample, very representative of the specimens from the locality. It is free of alteration and although not having visible crystals (which is common for the species) it shows the polysynthetic parallel growth typical for Bismuth, and it has the form of a “feather”. It is from an old mine closed for a long time ago.
Villanueva de Córdoba, Córdoba  Spain

Specimen size: 4.5 × 4.2 × 1.8 cm

With handwritten note from the Folch Collection


Bismuth.
Sold
Wulfenite (Chillagite)
Wulfenite (Chillagite).

RD10K9: Excellent miniature, very representative of this rare variety that is an intermediate member of the Wulfenite-Stolzite series. From a Catalan classic locality close to Barcelona. Crystals show a lenticular appereance.
Teresita Mine, Sant Fost de Campsentelles, Vallès Oriental, Barcelona  Spain

Specimen size: 2.3 × 2.1 × 0.8 cm

With handwritten note from the Folch Collection


Sold

PORTUGAL


Apatite-(CaF)

RM64L9: Thick tabular Apatite-(CaF) crystal showing with excellent definition the unusual, for the Panasqueira Mine, pyramid faces. With very marked concentric color zoning. There is a chip at the upper right corner.
The piece is accompanied by a handwritten label from the Folch collection.
Panasqueira Mines, Level 2, Beira Baixa  Portugal (±1972)

Specimen size: 2.9 × 2 × 1.4 cm

With handwritten note from the Folch Collection

Intense zoned fluorescence long & short UV

Apatite-(CaF).
Order
Apatite-(CaF) with Muscovite
Apatite-(CaF) with Muscovite. Apatite-(CaF) with Muscovite.

RF66L9: This sample is a rarity. A very curious combination in one piece of green and blue to violet Apatite-(CaF) crystals. With some slight pyramidal faces less transparent than the prism faces. Crystals are on a matrix.
The piece is accompanied by a handwritten label from the Folch collection.
Panasqueira Mines, Level 2, Beira Baixa  Portugal

Specimen size: 5.4 × 4.8 × 2.3 cm

Main crystal size: 1.3 × 1.3 cm

With handwritten note from the Folch Collection

Intense zoned fluorescence long & short UV

Order
Apatite-(CaF) with Muscovite

RX16K9: Thick tabular crystal group, one of them clearly dominant. Excellent color, transparency and brilliance. On a small Muscovite crystal matrix.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal

Specimen size: 3.8 × 2.7 × 2.7 cm

With handwritten note from the Folch Collection

Zoned fluorescence long & short UV

Apatite-(CaF) with Muscovite. Front
Front
Apatite-(CaF) with Muscovite. Rear
Rear
Order
Apatite-(CaF) with Ferberite and Muscovite
Apatite-(CaF) with Ferberite and Muscovite. Front
Front
Apatite-(CaF) with Ferberite and Muscovite. Side
Side

TV26J3: Group of very well defined short prismatic crystals, most of them doubly terminated, with a sharp crystal of Ferberite on a side of the specimen.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (10/1965)

Specimen size: 5.5 × 3.6 × 2.6 cm

Main crystal size: 2.2 × 2.2 cm

With handwritten note from the Folch Collection

Intense zoned fluorescence long & short UV

Sold
Apatite-(CaF) with Arsenopyrite and Muscovite

RB76K9: Thick tabular Apatite-(CaF) crystal, with excellent transparency, brilliance and color, with evident geometric zoning. On a Muscovite matrix with small Arsenopyrite crystals.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1972)

Specimen size: 4.2 × 3.2 × 2.0 cm

Main crystal size: 2.4 × 2.4 cm

With handwritten note from the Folch Collection

Fluorescent long & short UV

Apatite-(CaF) with Arsenopyrite and Muscovite.
Order
Ferberite with Muscovite and Siderite
Ferberite with Muscovite and Siderite. Front
Front
Ferberite with Muscovite and Siderite. Rear
Rear
Ferberite with Muscovite and Siderite. Top
Top

RE77K8: Tabular crystals, very deep and brilliant black in color with a string of Muscovite crystals in the upper third. Classic for the species, a contact twin on {100} is readily seen by the offset which forms the "ledge" upon which the Muscovite crystals are attached.
Panasqueira Mines, Level 2, Beira Baixa  Portugal (±1974)

Specimen size: 6.3 × 5.3 × 1.6 cm

With handwritten note from the Folch Collection


Order
Ferberite with Siderite

RH66H7: Parallel group of prismatic crystals well defined, bright and having well defined terminations. The matrix is formed by tabular crystals of Siderite.On the back side is a minor crystal, probable Scheelite, visible with the UV light. Curiously, Scheelite is a scarce species at the Panasqueira Mine.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal

Specimen size: 4.8 × 3.6 × 2.6 cm

Main crystal size: 4.8 × 2.2 cm

With handwritten note from the Folch Collection

Scheelite fluorescent long & short UV

Ferberite with Siderite. Front
Front
Ferberite with Siderite. Top
Top
Order
Cassiterite with Quartz and Siderite
Cassiterite with Quartz and Siderite. Cassiterite with Quartz and Siderite.

RK49K4: Great group of flat Cassiterite crystals. They are twinned, very bright and with small, very clear, crystals of Quartz on a matrix with lenticular crystals of Siderite. On the original label is written the year 1964.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1964)

Specimen size: 11.4 × 4.4 × 2.2 cm

Main crystal size: 0.7 × 0.5 cm

With handwritten note from the Folch Collection


Sold
Cassiterite

RH76K9: Cassiterite crystal with sharp faces and edges with a considerable size an twinned. This specimen comes from a little known Portuguese locality.
Boticas, Chaves  Portugal

Specimen size: 4.2 × 2.8 × 2.5 cm

With handwritten note from the Folch Collection


Cassiterite. Front
Front
Cassiterite. Side
Side
Order
Cassiterite
Cassiterite. Front
Front
Cassiterite. Top
Top

RQ6K9: Cassiterite crystal with sharp faces and edges. The twin is very marked. This specimen comes from a little known Portuguese locality.
Boticas, Chaves  Portugal

Specimen size: 3.4 × 3.2 × 2.5 cm

With handwritten note from the Folch Collection


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EUROPE (EXCL. SPAIN AND PORTUGAL)


Switzerland

Calcite

RV12L9: Totally flattened Calcite crystal (“papierspat”) with pyramid shape and very marked striations. The specimen is from a classic locality for this kind of Calcite crystal.
The piece is accompanied by a handwritten label from the Folch collection.
Maderannertal  Switzerland (±1947)

Specimen size: 5.2 × 4.5 × 0.8 cm

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Calcite. Front
Front
Calcite. Rear
Rear
Order
Doubly terminated Quartz
Doubly terminated Quartz.

RL46L9: Group of doubly terminated Quartz crystals, one of them clearly dominant, with excellent transparency and good brilliance. The crystal that serves as a base seems broken but is undamaged, with curious face growths.
The piece is accompanied by a handwritten label from the Folch collection.
Voralp Valley, Uri  Switzerland

Specimen size: 7.1 × 4 × 2 cm

Main crystal size: 6.6 × 2.2 cm

With handwritten note from the Folch Collection


Order
Doubly terminated Quartz with Hematite

RA17L3: Two crystals, one of them doubly terminated, totally clear, very bright, with Albite inclusions and Hematite and showing uncommon accessory rhombohedral oscillatory faces. From a classic Alpine area.
Cavradi, Curnera, Tavetsch, Grisons  Switzerland (±1954)

Specimen size: 5.6 × 3.9 × 3.7 cm

Main crystal size: 4.8 × 2.5 cm

With handwritten note from the Folch Collection


Doubly terminated Quartz with Hematite. Front
Front
Doubly terminated Quartz with Hematite. Side
Side
Order
Doubly terminated and twinned Quartz
Doubly terminated and twinned Quartz. Front
Front
Doubly terminated and twinned Quartz. Rear
Rear

RJ63I7: Twinned, doubly terminated crystal. The twin is very visible, an unusual thing for Quartz, because the suture crosses the front face of the prism and the opposite position of the accessory rhombohedron faces.
Wassen, Urï  Switzerland (±1980)

Specimen size: 5 × 2.9 × 2.9 cm

With handwritten note from the Folch Collection


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Doubly terminated Quartz

RV56K0: A floater group of doubly terminated crystals with parallel growths. From the original label we deduce it was mined, more or less, around 1980.
Etzlithal, Uri  Switzerland (±1980)

Specimen size: 6.2 × 3.9 × 3.2 cm

Main crystal size: 5.8 × 2.1 cm

With handwritten note from the Folch Collection


Doubly terminated Quartz. Font
Font
Doubly terminated Quartz. Rear
Rear
Order
Smoky Quartz with Chlorite
Smoky Quartz with Chlorite. Front
Front
Smoky Quartz with Chlorite. Side
Side

RT86I2: Very well defined and superbly transparent prisms.
Maderanertal, Amsteg, Uri  Switzerland (±1981)

Specimen size: 7.8 × 4.3 × 2.5 cm

Main crystal size: 7.8 × 2.7 cm

With handwritten note from the Folch Collection


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Doubly terminated Quartz "faden" with Albite

RB97H0: Parallel growth of doubly terminated crystals with a very evident “faden”. On the base of the piece there is a snowy white crystal of Adularia, very bright. The label has the note: Com (comprado / acquired) Sulzbach. Zürich 1947.
Bristenstock, Uri  Switzerland (±1947)

Specimen size: 11.8 × 6.7 × 5.4 cm

With handwritten note from the Folch Collection


Doubly terminated Quartz "faden" with Albite.
Order
Quartz "Tessiner habitus"
Quartz "Tessiner habitus".

RL26H7: Quartz crystal with Tessiner habit, with the typical very acute form of the faces of an uncommon rhombohedron, greatly lengthened producing the piling up on the central zone of the prism which becomes progressively thicker toward the base.
Val Maggia, Canton Tessin  Switzerland (±1980)

Specimen size: 5.3 × 2.8 × 2 cm

With handwritten note from the Folch Collection


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Orthoclase (Adularia) with Chlorite and Hematite

RG14K4: Parallel growth of sharp crystals of very well defined faces and edges, clean, translucent and bright on one of the sides of the sample and with Chlorite inclusions on the opposite.
Maderanertal, Uri  Switzerland

Specimen size: 3.2 × 3 × 2.4 cm

Main crystal size: 2.1 × 1.7 cm

With handwritten note from the Folch Collection

Minor fluorescence short UV

Orthoclase (Adularia) with Chlorite and Hematite. Front
Front