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Reference Specimens
The Folch Collection

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On this page we have shown the specimens that were in The Folch Collection. We didn't want to delete them from our website given their enormous historical value, as well as their quality, so we decided to save them and publish all of them on this special page, which will act as a kind of representative overview of this great collection.
We hope that you enjoy your visit, even if it is just to see this page!

USA


Arizona

Copper
Copper. Copper.

RV59H7: Extraordinary miniature. Faces and edges of the crystals have a very uncommon definition and the crystals forms are complex. Furthermore they are practically unaltered so they have an intense color and luster.
Ajo, Pima County, Arizona  USA

Specimen size: 3.4 × 2.3 × 1.7 cm

Main crystal size: 0.6 × 0.5 cm

With record from the Folch Collection

Probably Opal intense fluorescence short UV


 
Copper with Cuprite

RP38F8: Aerial growth of crystals of Cuprite (cube + dodecahedra) with slightly curved edges and on a matrix of native copper crystals. It was a 1961 gift from Mr. Albert Haag, of Tucson, as shown on the record for this one.
Bisbee, Cochise County, Arizona  USA (±1961)

Specimen size: 3.4 × 2.3 × 1.9 cm

Main crystal size: 0.6 × 0.4 cm

With handwritten note & record from the Folch Collection


Copper with Cuprite.
Copper with Cuprite.
 
Dioptase with Wulfenite
Dioptase with Wulfenite.
Dioptase with Wulfenite.

RB27F8: From the Mammoth Mine, no less! A group of Dioptase crystals with magnificent color, on matrix, and with the rare feature of some Wulfenite.
Mammoth Mine, Tiger, Arizona  USA (±1959)

Specimen size: 3.3 × 2.4 × 1.8 cm

With handwritten note & record from the Folch Collection

Calcite fluorescent long & short UV


 
Wulfenite
Wulfenite

RL87F8: A classic from the Red Cloud Mine. Two crystals that have excellent brilliance and color and that are on matrix. From the 1970s finds, which is when he bought it.
Red Cloud Mine, La Paz County, Arizona  USA

Specimen size: 2.5 × 2 × 1.5 cm

With handwritten note & record from the Folch Collection


Wulfenite.
 


California

Spodumene (Kunzite)
Spodumene (Kunzite). Front
Front
Spodumene (Kunzite). Rear
Rear

RC13K9: Floater and doubly terminated Spodumene crystal with multiple terminations at both ends. Pink color, with a strong dichroism.
Pala Chief Mine, Pala District, San Diego County, California  USA (±1962)

Specimen size: 5.2 × 2.8 × 1.2 cm

With handwritten note from the Folch Collection

Minor fluorescence long & short UV


 
Spodumene (Kunzite)

FB36K0: Floater doubly terminated crystal with rounded terminations. The color is good and especially intense on the extremities of the crystal.
Pala Chief Mine, Pala District, San Diego County, California  USA (±1962)

Specimen size: 5.7 × 2.8 × 1.3 cm

With handwritten note from the Folch Collection

Minor fluorescence with long & short UV


Spodumene (Kunzite). Front
Front
Spodumene (Kunzite). Rear
Rear
 
Spodumene (Kunzite)
Spodumene (Kunzite). Front
Front
Spodumene (Kunzite). Top
Top

FA47K0: Floater doubly terminated crystal with dissolution forms and anomaly growths. Its color is exceptionally intense. The original label notes that the specimen was sold to Sr. Folch by Mr. Bouest (or Bouert), from Los Angeles, October 1962.
Pala Chief Mine, Pala District, San Diego County, California  USA (±1962)

Specimen size: 4.1 × 4 × 2.5 cm

With record from the Folch Collection

Minor fluorescence with long & short UV


 
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


Rutile.
 
Rutile
Rutile.

TY11I8: Prismatic crystal with very well defined faces and edges. It is sharp, bright and dark brown.
Champion Mine, Laws, White Mountains, Mono County, California  USA (±1959)

Specimen size: 1.5 × 1.5 × 1.3 cm

With handwritten note from the Folch Collection


 
Caledonite with Linarite
Caledonite with Linarite

RB18G2: A sample from a very uncommon locality that we must not confuse with the better known Mammoth-St. Anthony mine. Caledonite, greenish-blue and vitreous, is with Linarite and they are very abundant on the Limonite matrix. This specimen was purchased from Burminco, Monrovia, California in 1955.
Baker, San Bernardino County, California  USA (±1955)

Specimen size: 8 × 6.3 × 5.2 cm

With handwritten note & record from the Folch Collection


Caledonite with Linarite.
Caledonite with Linarite. Caledonite with Linarite.
 
Andradite
Andradite.
Andradite

RE16G6: Crystals reach a considerable size and have an excellent luster. They show equal development of rhombohedral and trapezohedral forms, with some other faces of the cubic system. One of the crystals has a contact on one of its faces. A good sample from this classic American locality.
Calaveras County, California  USA (±1958)

Specimen size: 4.7 × 3.7 × 2.9 cm

Main crystal size: 3.4 × 2.7 cm

With handwritten note & record from the Folch Collection


 
Lawsonite
Lawsonite

RX14G2: An old sample from a very uncommon locality that we must not confuse with the type locality (Tiburon Peninsula). Pink crystals are well developed on a Glaucophane matrix. The sample was collected by Scott J. Williams (Scottsdale, Arizona) in 1948 and it was purchased from him by Folch in 1961.
Valley Ford, Sonoma County, California  USA (1948)

Specimen size: 3.5 × 3.2 × 3 cm

Main crystal size: 0.7 × 0.6 cm

With handwritten note & record from the Folch Collection


Lawsonite.
 


Colorado

Rhodochrosite with Quartz
Rhodochrosite with Quartz.

RA46H0: Two rhombohedral crystals with very sharp faces and edges on a white matrix of small Quartz crystals. Color is good for the locality which we must point out is historic.
American Tunnel, Howardsville, Silverton, Colorado  USA (±1966)

Specimen size: 3.5 × 2 × 1.5 cm

Main crystal size: 1.8 × 1.6 cm

With handwritten note from the Folch Collection


 
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.
 
Hübnerite with Quartz
Hübnerite with Quartz. Front
Front
Hübnerite with Quartz. Rear
Rear
Hübnerite with Quartz

RT89J1: Specimen from a classic locality, very different from those from other well known localities for Hübnerite. Crystals are extraordinarily flat and bright and form almost leafy aggregates. The color is bronze-red, typical of its place of origin and contrasts with the white concretions of Quartz.
Adams Mine, Cement Creek, Silverton, San Juan County, Colorado  USA (±1955)

Specimen size: 8.7 × 6.5 × 3.5 cm

With handwritten note from the Folch Collection


 
Hübnerite

RK70H0: An excellent classic, with very sharp crystals in groups of parallel growths, with the best color and luster and an esthetic contrast with the snowy white matrix. A very difficult specimen to find today.
Adams Mine, Cement Creek, Silverton, San Juan County, Colorado  USA

Specimen size: 5.1 × 3.4 × 4.5 cm

Main crystal size: 3 × 1.6 cm

With handwritten note from the Folch Collection


Hübnerite. Front
Front
Hübnerite. Rear
Rear
Hübnerite.
 
Microcline (Amazonite)
Microcline (Amazonite). Front
Front
Microcline (Amazonite). Top
Top
Microcline (Amazonite)

RA38F9: In this single crystal the color is magnificent, and the faces are exceptionally well-developed.
Pikes Peak, El Paso County, Colorado  USA (±1926)

Specimen size: 4.5 × 3.9 × 4.3 cm

With handwritten note & record from the Folch Collection


 


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

With handwritten note from the Folch Collection


Copper.
 
Epidote with Quartz
Epidote with Quartz.
Epidote with Quartz.

RZ8F8: A Prince of Wales classic. The long crystals of Epidote, apart from the perfect development of the faces, have a good degree of translucence and contrast with the numerous crystals of Quartz. Folch bought this from Al McGuinness in 1972 at Tucson.
Copper Mountain, Prince of Wales Island, Alaska  USA (±1972)

Specimen size: 6 × 5 × 3.3 cm

Main crystal size: 3.8 × 1.6 cm

With handwritten note & record from the Folch Collection


 
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, Silver Bow County, Montana  USA (±1955)

Specimen size: 3.2 × 3.1 × 2 cm

With handwritten note from the Folch Collection


Enargite with Pyrite.
 
Enargite with Pyrite
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, Silver Bow County, Montana  USA (±1955)

Specimen size: 3.5 × 3.3 × 2 cm

With handwritten note & record from the Folch Collection


 
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


Enargite with Pyrite.
 
Herderite
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

With handwritten note & record from the Folch Collection


 
Beryllonite
Beryllonite

RA97F8: From the type locality for this rare species. While not well-defined (as is typical for Beryllonite) one can see the faces of the crystal, which is notable for its transparency. A floater.
Stoneham, Oxford County, Maine  USA (±1965)

Specimen size: 2.1 × 1.8 × 1 cm

With handwritten note & record from the Folch Collection

Type locality


Beryllonite.
 
Grossular with Calcite
Grossular with Calcite.

RG86G0: Crystals have the dodecahedral form and they are bright and sharp, standing on a Calcite matrix.
The specimen proceeds from the A. Santos collection and it passed to Folch collection in 1952.
Phippsburg, Sagadahoc County, Maine  USA

Specimen size: 5.3 × 4.7 × 3 cm

Main crystal size: 1.3 × 0.9 cm

With handwritten note & record from the Folch Collection


 
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.
 
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, Sussex County, New Jersey  USA (±1970)

Specimen size: 9.3 × 5 × 5.5 cm

Main crystal size: 2.9 × 0.8 cm

With record from the Folch Collection


 
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, Grants District, New Mexico  USA (1959)

Specimen size: 4.4 × 4.1 × 1.9 cm

With handwritten note & record from the Folch Collection


Hewettite on Gypsum.
 
Twinned Rutile
Twinned Rutile.

RC37F8: A magnificent cyclic twin from the classic Magnet Cove locality. The perfect twin! A floater as the base has recrystallized. The typed Schortmann’s label also has some handwritten notes made by Folch.
Magnet Cove, Hot Springs County, Arkansas  USA (±1956)

Specimen size: 2.6 × 2.4 × 2.9 cm

With handwritten note & record from the Folch Collection


 


MEXICO - CANADA


Mexico

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


Pyrrhotite with Dolomite.
Pyrrhotite with Dolomite.
 
Polybasite with Chalcopyrite and Quartz
Polybasite with Chalcopyrite and Quartz. Front
Front
Polybasite with Chalcopyrite and Quartz. Top
Top
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.
With the sample there is a label of the supplier: Lidstrom’s, from Oregon 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

With handwritten note from the Folch Collection


 
Wulfenite with Calcite

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.
Los Lamentos, Chihuahua  Mexico (1960)

Specimen size: 4.5 × 4.3 × 4 cm

Main crystal size: 1.1 × 0.8 cm

With handwritten note from the Folch Collection


Wulfenite with Calcite. Front
Front
Wulfenite with Calcite. Rear
Rear
Wulfenite with Calcite. Top
Top
 
Wulfenite
Wulfenite. Wulfenite.
Wulfenite

RX96F8: The crystals, with perfect color and brilliance, have a lengthened form that is not common among examples from Los Lamentos.
Los Lamentos, Chihuahua  Mexico

Specimen size: 6.3 × 4.7 × 4 cm

Main crystal size: 0.6 × 0.3 cm

With handwritten note from the Folch Collection


 
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.
Mina Ahumada, Los Lamentos, Chihuahua  Mexico (±1973)

Specimen size: 11 × 7 × 4 cm

Main crystal size: 1.3 × 1.3 cm

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV


Wulfenite with Calcite. Wulfenite with Calcite.
 
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.
Los Lamentos, Chihuahua  Mexico

Specimen size: 7.3 × 4.4 × 3.5 cm

Main crystal size: 0.8 × 0.3 cm

With handwritten note from the Folch Collection


 
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, Chihuahua  Mexico (±1910)

Specimen size: 5.9 × 3.5 × 3.3 cm

Main crystal size: 1.7 × 0.2 cm

With handwritten note & record from the Folch Collection

Calcite fluorescent long & short UV


Silver with Calcite. Front
Front
Silver with Calcite. Rear
Rear
Silver with Calcite.
 
Adamite
Adamite. Front
Front
Adamite. Side
Side

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 de Mapimí, Durango  Mexico

Specimen size: 4.7 × 4.2 × 3.2 cm

With record from the Folch Collection

Extremely 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 de Mapimí, Durango  Mexico

Specimen size: 5 × 3.5 × 3.7 cm

With handwritten note from the Folch Collection

Extremely fluorescent long & short UV


Adamite.
 
Apatite-(CaF)
Apatite-(CaF).

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

Specimen size: 4.7 × 3.6 × 3.2 cm

Main crystal size: 2.2 × 1.1 cm

With handwritten note & record from the Folch Collection

Fluorescent long & short UV


 
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

Main crystal size: 3.3 × 3.1 cm

With handwritten note & record from the Folch Collection

Calcite very fluorescent long & short UV


Calcite on Quartz.
 
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

Main crystal size: 0.2 × 0.2 cm

With handwritten note from the Folch Collection


 


SPAIN


Gahnite with Quartz
Gahnite with Quartz

RE6K9: Well defined blue-grayish octahedral crystals on a Quartz matrix.
Bossost, Val d'Aran, Lleida  Spain

Specimen size: 5.0 × 4.0 × 3.4 cm

Main crystal size: 0.6 × 0.5 cm

With handwritten note & record from the Folch Collection


Gahnite with Quartz.
Gahnite with Quartz.
 
Wulfenite (Chillagite)
Wulfenite (Chillagite).

RA60K9: 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: 3.4 × 2.3 × 1.2 cm

With handwritten note from the Folch Collection


 
Wulfenite (Chillagite)

RC59K9: 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 appearance.
Teresita Mine, Sant Fost de Campsentelles, Vallès Oriental, Barcelona  Spain

Specimen size: 2.4 × 2.0 × 1.4 cm

With handwritten note from the Folch Collection


Wulfenite (Chillagite).
 
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


 
Cerussite with Galena

FQ11K0: The sample, mined in 1959, forms groups of twinned crystals from the old oxidation zone of this historic and classic Spanish locality. The matrix is basically of massive Galena and Cerussite with Limonite.
Mina Raimunda, El Molar, Tarragona  Spain (1959)

Specimen size: 7.5 × 4.5 × 4.4 cm

Main crystal size: 0.5 × 0.3 cm

With handwritten note from the Folch Collection

Fluorescent long UV & minor fluorescence short UV


Cerussite with Galena. Front
Front
Cerussite with Galena. Top
Top
Cerussite with Galena.
 
Dolomite
Dolomite.

RP17F9: The crystals of this aggregate have great clarity and brightness, with inner iridescent inclusions. The interpenetration twin is apparent in different zones on the specimen.
Cantera Azkarate, Eugui, Navarra  Spain (1968)

Specimen size: 7 × 5 × 3.7 cm

With handwritten note from the Folch Collection


 
Twinned Dolomite
Twinned Dolomite

FY47K0: Twin of two rhombohedral crystals of very well defined faces and edges, bright and translucent. The original label indicates that it was a gift from Carlos Díaz de Mauriño, from Pamplona, in 1967, to Sr. Folch.
Cantera Azkarate, Eugui, Navarra  Spain (±1967)

Specimen size: 7.7 × 6.1 × 6 cm

Main crystal size: 3.8 × 3.7 cm

With handwritten note & record from the Folch Collection


Twinned Dolomite. Front
Front
Twinned Dolomite. Top
Top
 
Doubly terminated Calcite
Doubly terminated Calcite. Front
Front
Doubly terminated Calcite. Side
Side

RZ11H9: The sample mined the August 1960, must be one of the first known from the locality. Doubly terminated, a twin of two trapezohedrons with rhombohedrons forming the terminations.
Minas de La Florida, La Florida, Cantabria  Spain (06/1960)

Specimen size: 5 × 3.7 × 2.8 cm

With handwritten note from the Folch Collection

Minor fluorescence short UV


 
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


Sphalerite.
 
Sphalerite with Dolomite
Sphalerite with Dolomite.
Sphalerite with Dolomite. Sphalerite with Dolomite.
Sphalerite with Dolomite

RH89K9: Complex Sphalerite crystal group, with multiple faces and curved edges. The color is excellent and contrasts with the snowy white Dolomite matrix.
Las Mánforas Mine, Áliva, Picos de Europa, Cantabria  Spain (±1968)

Specimen size: 10.1 × 7.5 × 6.5 cm

Main crystal size: 5.7 × 5.3 cm

With handwritten note from the Folch Collection


 
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


Tyrolite with Chrysocolla and Azurite. Tyrolite with Chrysocolla and Azurite.
 
Cinnabar
Cinnabar.

RK64L3: Well defined and bright Cinnabar crystals, some of them very aerial, with prominent rhombohedral faces with curvatures and fine striations. We can see small drops of liquid mercury on the matrix.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1964)

Specimen size: 3.4 × 3.1 × 2.2 cm

Main crystal size: 0.4 × 0.3 cm

With handwritten note from the Folch Collection


 
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.
Pozo de San Teodoro, 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


Cinnabar with Barite.
Cinnabar with Barite.
 
Cinnabar with Dolomite
Cinnabar with Dolomite. Cinnabar with Dolomite.

RM14L3: Well formed Cinnabar crystals in a vug, with Quartz and Dolomite. The Folch label advises about the presence of Calomel (Calomelanos) as “small crystals inside the geode” with brown yellowish tones, but after analyses it has been demonstrated that it is Dolomite.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1979)

Specimen size: 4 × 3.8 × 2.5 cm

Main crystal size: 0.3 × 0.2 cm

With handwritten note from the Folch Collection


 
Cinnabar with Quartz

RQ7K9: Lively red crystals, good brilliance, that contrast on a snowy Quartz matrix.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain

Specimen size: 7.2 × 4.5 × 1.4 cm

Main crystal size: 0.5 × 0.4 cm

With handwritten note from the Folch Collection


Cinnabar with Quartz.
Cinnabar with Quartz.
 
Cinnabar with Calcite
Cinnabar with Calcite.
Cinnabar with Calcite.

RM36I7: Groups of small crystals of excellent color and luster that contrast with a matrix rich in Quartz.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain

Specimen size: 5.8 × 4 × 3.3 cm

With handwritten note from the Folch Collection


 
Cinnabar with Dolomite

RQ14H8: Crystals, being small, have good color, luster and transparency and they strongly contrast with the white Dolomite where they are placed.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain

Specimen size: 4 × 3.4 × 2.9 cm

Main crystal size: 0.4 × 0.3 cm

With handwritten note from the Folch Collection


Cinnabar with Dolomite. Front
Front
Cinnabar with Dolomite. Top
Top
 
Cinnabar
Cinnabar.
Cinnabar.

RE76F8: The crystals are small but the color and brilliance are exceptional. Folch found it at the Almadén Mine in 1923.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (1923)

Specimen size: 6.2 × 4.2 × 3 cm

Main crystal size: 0.4 × 0.3 cm

With handwritten note & record from the Folch Collection


 
Cinnabar

RF47F8: A splendid miniature with perfect growth of the crystals, in which the faces of the rhombohedron dominate. The color and brilliance are excellent. Folch found it at the Almadén Mine in 1923.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (1923)

Specimen size: 3.1 × 2 × 1.5 cm

Main crystal size: 0.4 × 0.4 cm

With handwritten note & record from the Folch Collection


Cinnabar.
 
Cinnabar
Cinnabar. Front
Front
Cinnabar. Top
Top

RR16I7: Parallel growth of rhombohedral crystals. They have a considerable size for the locality and present good color and luster, even considering the long time passed since the specimen was mined.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1979)

Specimen size: 2 × 1.4 × 1.1 cm

With handwritten note from the Folch Collection


 
Cinnabar with Dolomite

RQ17K9: Excellent miniature, very representative of the Almadén specimens. Showing well defined rhombohedron crystals, some of them with parallel growth. On matrix.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1978)

Specimen size: 3.0 × 1.8 × 1.4 cm

Main crystal size: 1.0 × 0.8 cm

With handwritten note from the Folch Collection


Cinnabar with Dolomite. Front
Front
Cinnabar with Dolomite. Top
Top
 
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


 
Pyromorphite
Pyromorphite

RA88G0: A typical specimen from El Horcajo. Floating, with groups of parallel prismatic crystals forming walls. Crystals are grass green colored, with typical zones and changes of color near the tips.
El Horcajo, Ciudad Real  Spain

Specimen size: 5.7 × 2.8 × 2.3 cm

With handwritten note from the Folch Collection


Pyromorphite. Front
Front
Pyromorphite. Rear
Rear
 
Pyromorphite
Pyromorphite.
Pyromorphite.
Pyromorphite

RK88G2: Groups of prismatic crystals with the edges lightly curved. Some crystals are partially covered with and have inclusions of a mineral described as Litharge on the label, but we can't confirm that because we have not analyzed the mineral to certify it.
El Horcajo, Ciudad Real  Spain

Specimen size: 5.9 × 4.6 × 3.3 cm

Main crystal size: 1 × 0.3 cm

With handwritten note & record from the Folch Collection

Fluorescent long & short UV


 
Bismuth

RA26G8: An historical sample, with a Folch’s autograph note, exactly detailing the point of the mine where it was mined, the gallery and the level and also the month and the year (1959). The sample is a close group of bright deformed and grained crystals, which are sharper in a zone rich on Quartz.
Mina Dolores, Nivel 60, Galería Sur, Pozoblanco, Córdoba  Spain (1959)

Specimen size: 4.7 × 3.4 × 3.7 cm

With handwritten note from the Folch Collection


Bismuth.