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).

60 €

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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.

65 €

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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.

The allanite-(Ce) specimens from Trimouns are a classic of French mineralogy. It should be said that if these crystals are analyzed compositionally, a zoning with dissakisite-(Ce) is observed. Both species belong to the epidote group and are compositionally differentiated by the presence of Fe(II) (allanite) and Mg (the second). In this specimen we can observe several well-defined crystals of this mineral, one of them larger, which contrasts with the dolomite matrix.

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Group of green to brownish-green pyromorphite crystals, with very marked hexagonal shapes and defined faces and edges. On matrix. It belongs from this classic Spanish mine and from which good quality specimens like this one have come out. With Viñals handwritten label.

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A very good-sized specimen of atacamite formed by numerous radial aggregates of tabular crystals, of intense green colour and transparence, which are disposed on a matrix with chrysocolla and malachite. This specimen has both sides worthy of a display case. It is accompanied by the handwritten label of Joan Viñals.

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Excellent specimen of fluorapophyllite-(K) with very good size crystals that show the shapes of the tetragonal prism with faces of the dipyramid truncated by the basal pinacoid. Very good transparency, brilliance and definition. It is disposed very aerial on a matrix with stilbite. With handwritten label by Joan Viñals.

130 €

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Shungite is a rock, an intermediate form between the amorphous carbon and the graphite containing carbon (30%), silica (45%), and silicate mica (about 20%). Schungite carbon is a fossilized organic material of sea bottom Precambrian sediments of high level of carbonization containing the fullerene-like regular structures. Shungite got its name after the village of Shunga in Karelia (Russian Federation), located on the shore of Onezhskoe Lake, where is located the only one mineral Zazhoginsky deposit of shungites on the territoty of the Russian Federation.
Shungite has a heterogeneous molecular structure in which carbon occurs as 10 nm globules irregularly distributed within carbon showing no structure. The unusual physicochemical and structural properties of shungite are used in diverse industrial and environmental applications including metallurgy, water purification, thermolysis and organosynthesis of cyclic hydrocarbons. Shungite is an effective sorbent for removal of organic and inorganic substances, pathogenic bacteria and heavy metals from contaminated water (Ore Geology Reviews, 2004; 24, 1-2:135-154).

Good size garnet crystal belonging to the almandine-spessartine series, usually with a predominance of the first one. The analyzes indicate the presence of Fe and Mn, with traces of Mg. These specimens were identified as pyrope (magnesium aluminosilicate), but the analytical results do not indicate this.

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