Rich group of small pyromorphite crystals, prismatic, hexagonal and truncated by pinacoidal faces. Good color and shine. Examples of this mine are not easy to come by today. The sample is accompanied by the handwritten label of Joan Viñals.

65 €

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This is a really good crystal cluster of bismuthinite from the Mina Tazna in Bolivia. It is formed by large, terminated, prismatic crystals of bismuthinite, divergent, gray metallic. Some crystals show a metallic patina from a thin coating of marcasite/pyrite. On the back side some quartz crystals and gray-white uncovered metallic natural bismuthinite crystals. The Tazna Mine is a historic bismuth-tungsten mine in the high Andes of Bolivia that has produced noteworthy specimens for decades. Samples with this quality are very rare seen on the market. Specially for connoisseur "gray" mineral collectors...

280 €

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Group of baryte crystals, between translucent and transparent, colorless and of good size, one of them standing out. They show faces of the orthorhombic prisms and the pinacoid. The largest one shows beveled edges, with an part contacted by a disapeared matrix. It is accompanied by powdery hematite. It is a sample with many years.

Fluorite specimens from Sant Marçal mines usually appear as aggregates of cubic crystals, defined, sometimes sprinkled or partially covered by quartz crystals. Yellow to greenish tones are the usual ones. Specimens with violet to bluish or green colors (depending on the type of incident light) are much less frequent and highly appreciated by collectors. These specimens we offer were collected at the beginning of the 70s. In this specimen we can observe cubic crystals with this bluish to greenish tone, translucent and disposed on a characteristic ochy "pegmatite" matrix. They are partially covered with small but brilliant quartz crystals.

The Sant Marçal mines (also known as Matagalls mines) are located in the Montseny massif, on the eastern slope of the Matagalls peak (1,700 m). Mining works were carried out at 1,250 to 1,350 m of altitude. They were mined until the mid-90s and have been partially restored. Currently this area belongs to the Montseny Natural Park, so the collection of specimens is totally prohibited.

Fluorite specimens from Sant Marçal mines usually appear as aggregates of cubic crystals, defined, sometimes sprinkled or partially covered by quartz crystals. Yellow to greenish tones are the usual ones. Specimens with violet to bluish or green colors (depending on the type of incident light) are much less frequent and highly appreciated by collectors. These specimens we offer were collected at the beginning of the 70s. In this specimen we can observe cubic crystals with this bluish to greenish tone, translucent and disposed on a characteristic ochy "pegmatite" matrix. They are partially covered with small but brilliant quartz crystals.

The Sant Marçal mines (also known as Matagalls mines) are located in the Montseny massif, on the eastern slope of the Matagalls peak (1,700 m). Mining works were carried out at 1,250 to 1,350 m of altitude. They were mined until the mid-90s and have been partially restored. Currently this area belongs to the Montseny Natural Park, so the collection of specimens is totally prohibited.

Anglesite specimens from this classic Moroccan mine are quite difficult to find. In this piece we can see numerous lanceolated prismatic crystals of this lead sulphate, very brilliant, with well defined faces and edges, transparent and showing the natural yellow colour characteristic of this species and mine. They are disposed filling cavities in a galena matrix.

Good size specimen formed by a matrix with cubic fluorite crystals, colorless and very transparent. They are partially covered by aesthetic white tabular baryte crystals, peppered with small altered pyrite and chalcopyrite, some of them included in fluorite.

In this Bolivian Andean mining area, around 2010-2013, a small area with antimony and silver ore was found, highlighting some specimens of stephanite, a silver sulfoantimonide. This floater specimen is formed by a group of interpenetrated crystals, with parallel growth, and showing orthorhombic prism shapes with striations and complex terminal faces. It is distinguished from pyrargyrite by being completely opaque to light, while the latter usually gives red colors (red silvers). An exceptional specimen reminiscent of the best and ancient Mexican stephanite, although this is from the Porco mine, the oldest and most significant silver mine in Bolivia.

Tabular lanceolated crystals of baryte, translucent in the core and opaline in the outer areas, interpenetrated and brilliant. They are disposed on a matrix formed by small siderite crystals and layering septarian cavities. An Aragonese mineral curiosity.

Tabular lanceolated crystals of baryte, translucent in the core and opaline in the outer areas, interpenetrated and brilliant. They are disposed on a matrix formed by small siderite crystals and layering septarian cavities. An Aragonese mineral curiosity.

Very aesthetic specimen formed by several aggregates of vanadinite crystals, labeled as arsenical endlichite. Very well defined hexagonal prisms, beige in color, peppered with tiny but brilliant and well defined crystals of descloizite-mottramite, with dark honey tones. The descloizite-mottramite forms globules but also partially covers vanadinite crystals, especially on the pinacoidal faces and forming "half moons", a curiosity. These specimens from this Moroccan mine are not common.

Microcline crystal with muscovite inclusions. It presents faces of the Baveno twin. The microcline crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

These specimens from the La Viesca mine are very rare and appeared in the middle of the last decade. It is a very bright specimen formed mainly by cubic fluorite crystals with polysynthetic growths on the faces and asymmetrically beveled edges, transparent and colorless. They are accompanied by bright and well-defined chalcopyrite crystals, along with complex and transparent honey-colored crystals of sphalerite. With galena and quartz. Highly prized for their rarity.

Group of magnetite crystals with octahedral shapes and polysynthetic growths on the faces, good luster and size. With pyrite crystals on the backside of the specimen. It belongs from the Lluis Manchion collection with a handwritten label.

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This specimen shows us a rich group of prismatic schorl crystals, with well defined terminal faces and striated prism. Intense black color and excellent brilliance. They are accompanied by albite and muscovite crystals.

Group of very well defined fluorite crystals, between transparent and translucent, and with a yellowish-green color characteristic of this mine. Some have color zoning. They are accompanied by small crystals and hyaline quartz. These specimens that we offer were collected in the early 70s.

Rich group of tabular semseyite crystals forming brilliant rosettes. It is accompanied on the matrix with galena, chalcopyrite, sphalerite and some quartz. Nowadays, these specimens are not easy to find.

Very good size specimen of celestine from this classic Spanish locality. In this specimen we can observe various botryoidal to stalactitic forms, one of them in the form of a bridge-curl, and which cover old celestine crystals, as evidenced by the rounded prismatic shapes.

Rich group of quartz crystals, translucent to hyaline, and with the terminal faces of the rhombohedron different from the usual ones. Among them, a very good size doubly terminated crystal stands out, well defined and with the faces of the prism with striations perpendicular to the main axis. They are disposed on a matrix with quartz and sphalerite crystals.

Specimen upholstered by numerous libethenite crystals, they are accompanied by pseudomalachite. Under magnification we observe pseudooctahedral forms, with brightness and an intense green color. From this classic Portuguese locality.

Radiated spray aggregates of fine dawsonite crystals, a rare aluminum sodium hydroxylcarbonate. They aredisposed on a marl matrix. They come from a known area for the species but from a new find.

Stalactitic malachite growths, with an intense color, brilliant, velvety and disposed aerially on the matrix.

Stalactitic malachite growths, with an intense color, brilliant, velvety and disposed aerially on the matrix.

These specimens come from an andesite quarry located in NE Hungary. This quarry is worked by Colas Északkő Co. In year 2013, hyaline beautiful specimens of opal were collected. In the quarry explosives are used to excavate the rocks, so most of the specimes dissapears. From summer 2015 access is not permitted, but some specimens were collected before... These facts make it difficult to see good samples of this quality.
Hyalite opal (opal-AN) aggregates (crown shaped) are completely transparent, like drops of water, with an exceptional brightness. They are highly fluorescent under shortwave UV and also under longwave. Sometimes they accompanied by globular aggregates of calcite-aragonite. They are disposed very aerial on a porous matrix of andesite.

80 €

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Very esthetic specimen of elbaite (var. rubellite) showing an elongated prism with striations, defined terminal faces, good brilliance, translucent and the characteristic color, slightly lighter in the upper part. The specimen has been consolidated without affecting its aesthetics. They are disposed very aerial on a matrix with feldspar and quartz.