Specimen of fluorapatite from the famous Cerro de Mercado mine in Mexico. The main crystal is prismatic, terminating in the faces of the hexagonal dipyramid. The luster and transparency are excellent and the color is very intense greenish yellow. It is arranged on a calcite matrix containing elongated augite crystals.

85 €

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Specimen of fluorapatite from the famous Cerro de Mercado mine in Mexico. It is presented as a prismatic crystal terminated by the faces of hexagonal dipyramids. The transparency and brilliance are excellent and the color is very intense yellow. It is arranged on a matrix containing hematite and small augite crystals.

70 €

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These specimens of adamite are among the most aesthetic that this classic Mexican mine has offered us. Botryoidal aggregates of copper-bearing adamite, shiny and also forming sheaves. Under LW ultraviolet light they present an exceptional green fluorescence. Nowadays it is difficult to find specimens with this quality.

A very heavy specimen of native antimony, with an intense, metallic luster, with internal bands of possible stibnite. It is accompanied in the oxidation zone by yellowish stibiconite and valentinite. Excellent specimen for collectors of native elements. Quite rare.

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Group of stephanite crystals that form a floating cluster, with various interpenetrated prismatic crystals, with defined faces and edges and brilliance. This specimen comes from an unusual Mexican mine for the species and is accompanied by the label of a well-known mineral dealer in Madrid. The piece belongs from the Nicolau collection (Barcelona). A very aesthetic and representative miniature of the species.

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Lanceolated hemimorphite crystals, defined, brilliant, colorless and transparent. They are arranged in a  limonite-goethite matrix. Classic and aesthetic material from this famous Mexican mine, from the E. Nicolau collection (Barcelona).

A classic Mexican pseudomorphosis. Stibiconite appears as a brilliant coating on well-formed prismatic stibnite crystals of very good size. The terminations of the crystals are well defined, while on the back of the specimen they are flat due to being in contact with the wall of the geode or cavity from which the piece was extracted. Stibiconite was for a long time an acknowledged species, but is now questionable, in line with the revised nomenclature of the minerals of the pyrochlore supergroup. These specimens are very difficult to see on the market.

Group of dipyramidal wulfenite crystals, very defined, bright and sharp. They are arranged on a matrix covered with olive green mottramite. On the back side, numerous cavities lined with green mimetite with orange wulfenite crystals. A very entertaining and aesthetic piece. From the E. Nicolau (Barcelona) collection with handwritten label by J. Viñals.

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Various globular aggregates of smithsonite are disposed in a goethite. They fill the cavities in the matrix. They have a good brilliance along with a slightly bluish gray color. A curious specimen from this classic Mexican mine.

The classic and Mexican Ojuela mine never ceases to amaze us. In this specimen we can enjoy a vug in the limonite matrix completely upholstered by aggregates of arsendescloizite crystals, with a slightly yellowish green color, on which numerous acicular aggregates of green malachite crystals have grown. On the label, they were described as conichalcite, but analysis indicates that it is this copper carbonate. Also accompanied and partially covered by calcite crystals, very transparent and bright, partially corroded naturally. A very aesthetic and unusual specimen for this mine.

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Specimen of Mexican banded opal. An old piece from the Manchion collection acquired in 1991.

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Rich group of lanceolated hemimorphite crystals, thick, very brilliant and transparent. With calcite and on a goethite matrix. A classic of this Mexican mine.

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Very old specimen from Ojuela mine. It presents various globular aggregates of chrysocolla, sprinkled with small crystals of hemimorphite and bluish needles of aurichalcite. Under the magnifying glass is very interesting. From the Trigo collection (Mataró).

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Druse of tabular wulfenite crystals, transparent, well defined and with a soft yellowish to greenish hue. They are accompanied, on a goethite matrix, with sheaf aggregates of mimetite crystals. Very aesthetic.

Specimen of native silver from this more than classic Mexican locality such as Batopilas. This specimen shows numerous herringbone-patterned, arborescent and skeletal silver aggregates formed by crystals spinel-twin, very elegant and with luster and colour. They are disposed aerially on a matrix with calcite. Finding specimens of this quality and size (and price) from this mine is not easy at all. It belongs from a former Austrian collection.

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Very rich specimen formed by aggregates of prismatic crystals of mimetite, transparent, forming sheaves and divergent growths. The yellow-orange color and luster make them stand out on a matrix with romobohedral calcite crystals. A classic from the 1960s to 1970s.

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Exceptional specimen of opal, fire opal, with an intense orange to reddish color, with brilliance and transparence observed since it is an opal nodule with two light inputs. All light. It is enclosed in a very hard rhyolitic matrix. These are sometimes also called as "jelly opals" due to their unique color and waxy luster. This specimen was acquired by Joan Astor, at the end of the 80s, from the well-known Enric Kucera (Barcelona), a great connoisseur of Mexican mines. A gem.

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Fine aggregates of bright and translucent gillespita, strawberry red. In a matrix of white sanbornita that contrasts with the color. Gillespita is a rare barium and iron phyllosilicate. This is a very rich, colorful and excellent piece for the species.

A well-balanced spray of doubly terminated amethyst crystals from the famous Guerrero locality. An aesthetic cluster of colored amethyst crystals, representing fine color from this deposit, in crystals which are still gemmy and translucent. Small nicks on terminal faces, only visible under magnification. Not easy to find nowadays. Ex. Trigo collection.

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Specimen formed by a crustof purple smithsonite, botryoidal, pink to lilac, with satiny luster and good translucence. A miniature sample of the old smithsonites from the classic Choix locality. With old label from the Trigo (Mataró) collection, where it indicates Durango and "cobaltoan" smithsonite. But the locality is Choix.

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Stibiconite species totally replacing a stibnite crystal, very elongated, with multiple terminations and partially covered by scalenohedral calcite crystals with staggered growths. A classic of Mexican mineralogy. It belongs to the former Joan Astor collection (Barcelona) with a handwritten and typewritten label.

120 € 90 €

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A very ancient specimen showing a quartz matrix with carbonates and pyrite crystals. Covered with thin boulangerite needle-like crystals. Very brilliant and dotted with calcite or dolomite colourless rombohedrons. The original handwritten label of the Astor collection, dated in 1978, indicates it comes from Concepción del Oro, but we believe we can say it is from the Mazapil area, a locality very close to Concepción. In those years, geographical themes were not so determined. Adquired in a very "old mineral shop" in Plaça Reial square, Barcelona.

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Group of quartz crystals, of the amethyst variety, the main one is very elongated. Very transparent, with defined faces and edges, and with a delicate and uniform purple color. From the former Trigo collection, from Mataró (Catalonia), with its handwritten label.

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Rich specimen of parasymplesite from this classic Mexican mine. Several divergent aggregates of prismatic to tabular parasymplesite crystals, with a light green color on the surface and a very dark green, almost black, color inside. They are disposed on a goethite matrix with cavities layered by small honey-colored arseniosiderite crystals and adamite. This specimen belongs to the Joan Astor collection (Barcelona), with a handwritten label and another typewritten.

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Natanite is a rare iron and tin hydroxide. It shows octahedral crystals truncated at their vertices by the faces of the cube. In this aesthetic specimen we can observe some very well defined, transparent crystals with an intense yellow color. They stand out on a matrix with brilliant rhodochrosite crystals. An exceptional sample for the species and the locality. Although the best specimens of natanite have been found in the Potosí mine, the type locality for the species is in the former Soviet Republics of Kyrgyzstan and Tajikistan.