Este ejemplar de fluorita de la cantera Berta nos muestra grupos de cristales pero también cristales aislados. La matriz es la granodiorita de color rojo "antigua" y se halla tapizada por diminutos octaedros de fluorita casi incoloros. Si algo hay que destacar de esta pieza es que los cristales octaédricos de fluorita muestran en los vértices las caras del rombododecaedro, del cubo y del tetraquishexaedro.

This specimen of fluorite from the Berta quarry shows us a group of crystals but also isolated crystals. The matrix is "old" red granodiorite and is lined by tiny, almost colorless fluorite octahedrons.

Radial aggregates of needle like erythrite crystals. They stand out from the goethite matrix.

Radial aggregates of needle like erythrite crystals. They stand out from the goethite matrix.

Radial aggregates of needle like erythrite crystals. They stand out from the goethite matrix.

Espécimen muy rico formado por numerosos agregados de cristales aciculares blancos (transparentes) de picrofarmacolita, acompañados de eritrita rosada rica en Mg (hörnesita), junto con farmacolita y sainfeldita. En matriz. Estos ejemplares fueron extraídos de la mina Bou Azer en febrero de 2018. Son muy estéticos bajo aumento, con buen tamaño para colección.

Radial aggregates of needle like erythrite crystals. They stand out from the goethite matrix.

This is a specimen of tabular barite crystals, colorless to yellowish tones and very good transparence. It belongs from the Mines d'Osor, currently closed and from which it is impossible to obtain these specimens. The mine closed in 1979 and had eleven levels, with a 290 meter deep shaft. You can still see the ruins of the old facilities and the well from which sphalerite, galena and fluorite were extracted and treated.

This is a specimen of tabular barite crystals, colorless to yellowish tones and very good transparence. It belongs from the Mines d'Osor, currently closed and from which it is impossible to obtain these specimens. The mine closed in 1979 and had eleven levels, with a 290 meter deep shaft. You can still see the ruins of the old facilities and the well from which sphalerite, galena and fluorite were extracted and treated.

A rich group of epidote crystals of a very good size and an intense green, almost black color. The crystals show very well defined prism faces of different orders. This crystal shape is quite unusual for this Moroccan locality.

Well-defined twinned microcline crystal from a very unusual locality, not seen in collections. It cbelongs from the collection of Peter Seroka, known for his interest in feldspars.

45 €

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Cerussite specimens from the Mibladen area are usually yellowish. In this specimen from the Seroka collection we can see very brilliant and transparent crystals and the largest ones are cyclically twinned. This type of specimen is not common in this area. It fluoresces weakly yellow under UV light.

80 €

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Group of tourmaline schorl crystals in parallel growth, with an intense black color and brilliance. With defined top terminal faces. It belongs from the collection of Peter Seroka (L'Escala, Catalonia).

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Excellent specimen of scolecite from a locality rarely seen in collections, located in the east of Iceland. It is a radiated aggregate of crystals, with an intense white color, luster and good size. A curiosity arrived from the cold lands.

Group of scalenohedral calcite crystals, transparent and allowing you to see internal growths (phantoms) of calcite sprinkled with pyrite. On the back numerous crystals of violet fluorite and dolomite. From this classic Asturian locality.

Excellent and aesthetic specimen formed by a large group of fluorite crystals, very well defined, with a cubic shape and beveled edges by the dodecahedron forms. Translucent, with purple zoning colour. They are disposed on a white calcite matrix, on which they contrast. A piece for the best display.

Botryoidal aggregates of smithsonite with a very tastefull bluish green colour, translucent and with brilliance. They are disposed on matrix. From a very interesting American locality. It fluoresces intensely under LW-UV light.

Intense orange color and good luster chabazite-Ca well defined crystals. With matrix on its back side.

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 small but very defined torbernite crystals. They are arranged on a matrix of crystallized quartz. Unusual for this Portuguese town.

Group of microcline crystals, of good size, defined and brilliant, showing the Manebach twin, characteristic of this species. With J. Viñals handwritten label.

Reserved

Aesthetic specimen of goethite with chalcophanite with cavities covered by numerous aggregates of sheaf crystals of copper-bearing adamite, with a faint green color in the convergence zone and greener at the ends. It is accompanied by more developed crystals of cuprian austinite. A pleasure under magnifying lens. With old labels.

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Druse formed by numerous globular aggregates of greenish-brown zanazziite disposed on a pegmatitic matrix with muscovite. Zanazziite is a rare hydrated calcium, magnesium, iron, aluminum and beryllium phosphate. With a handwritten label.

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Vesuvianite crystal, with defined faces, doubly terminated, green to dark brown in color. It is labeled as coming from the Imilchil area. Good size and aesthetics.