Twinned cinnabar, with well defined faces and edges, red color slightly silvery, well formed and almost 2 cm in size. It is disposed in a very aesthetic way on dolomite crystals. At the time, this locality produced world-class specimens such as the one we offer. Simply spectacular.

This specimen has a bit of history... The piece was acquired in May 1987 at a fair in Segovia that was held in the Lozoya tower. At that time the labels were rather "approximate". This specimen was labeled as "Poitiers" chalcedony. Looking for intertwined information between chalcedony and France, it turns out that there is a locality where similar chalcedonies appear, near Vienne, in Mauprévoir. Curiously, this locality is in a historical region named Poitou-Charentes (Peitau i Charantas in Occitan), which makes us think that the correct locality is Mauprévoir. Old and fine specimen.

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.

Smoky quartz crystals in parallel growth. Translucent, with a uniform smoky tone, they alternate glossy and matt faces. The quartz crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

Smoky quartz crystal on a microcline matrix. Translucent, with a uniform smoky tone, it alternates brilliant and matte faces. The quartz crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

Microcline crystals in parallel growth. They show 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.

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.

Smoky quartz crystals with parallel growths. Smoky tone is good. The quartz crystals from this quarry are a classic of Catalan mineralogy. Currently quarry is abandoned and it is difficult to find new specimens.

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

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.

Rich specimen formed by numerous isolated fluellite crystals and forming groups, with a pink to violet color, an unusual fact since fluellite is usually colorless. It is accompanied by whitish to slightly greenish growths of metavariscite. Under magnification we can observe globules of this last phosphate. These specimens are a classic of mining in Navarra and are currently only available through old collections.

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.

Specimen formed by numerous globular aggregates of talc, silky and slightly yellowish, which are accompanied by honey-colored dolomite crystals. A very aesthetic and old specimen for this mine from León.

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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Floater crystals of smoky quartz with parallel growths. The quartz crystals from this quarry are a classic of Spanish mineralogy. Currently the quarries are abandoned and it is difficult to find new specimens.

In a building works in Cal Gairal street, in the Rocabruna village (Bruguers, Gavà), a few specimens of intense green variscite were found forming veins in grey slates. Unfortunately when we were able to access these works, the exact place where these specimens were extracted from had already been filled and covered with concrete. Variscite had not been found in the Bruguers area for many decades, let alone with this quality. X-ray diffraction results indicated the presence of crandallite. We recommend the recently published book: "Mines i minerals de la serra de les Ferreres. Les mines de Rocabruna, Bruguers, Gavà" (Catalan language).

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In a building works in Cal Gairal street, in the Rocabruna village (Bruguers, Gavà), a few specimens of intense green variscite were found forming veins in grey slates. Unfortunately when we were able to access these works, the exact place where these specimens were extracted from had already been filled and covered with concrete. Variscite had not been found in the Bruguers area for many decades, let alone with this quality. X-ray diffraction results indicated the presence of crandallite. We recommend the recently published book: "Mines i minerals de la serra de les Ferreres. Les mines de Rocabruna, Bruguers, Gavà" (Catalan language).

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This is a really good piece of Stibarsen, a rare arsenic antimonide alloy, from this famous mineral producing region in the Czech Republic. For years, stibarsen was labeled as allemontite, which is no longer a species. The species is now stibarsen, and allemontite is an archaic/invalid term. This piece features the classic botryoidal form that is well-known from Pribram. A good representation of this classic old material. From the collection of Juan M. Casanova.

Aesthetic starbursts of very lustrous, golden rutile needles epitaxial on black hematite crystals. From the classic Novo Horizonte mines. The uneven starburst really adds character to this fine piece, which looks great from both sides.

Aesthetic specimen that combines an upper part formd by goethite botryoidal aggregates, with a semi-matt luster, and a lower part with stalactitic growths of manganese oxides. They are accompanied by hematite of intense red color and baryte. A very interesting specimen from "la Sierra de la Unión".

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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.

Dadsonite is a rare chloro-sulfoantimonide of lead, compositionally differing from boulangerite by this chlorine anion (1 atom of Cl for 60 atoms of S!). In the "bad-lands" area of Sant Ponç (or Saint-Pons) there are lenticular levels of siderite and calcite. The formation of this rare sulfosalt is based on the redissolution of other sulfosalts in the presence of chlorides.
The fine needles of dadsonite usually appear included in calcite with siderite, along with boulangerite. Once the calcite is removed by chemical processes, needles emerge in all their beauty. It can also be found forming radial aggregates in matrix cavities. The dadsonite from Sant Ponç can probably be considered among the best worldwide.

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Titanian hydroxylclinohumite porphyroblasts with white-greyish diopside and antigorite serpentinite. The varietal name titanoclinohumite (older literature uses the name "titanolivine" for this variety) is commonly used to indicate Ti-bearing hydroxylclinohumite found in metamorphosed serpentinites. A very interesting specimen from unusual locality for the species.

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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.

A good sized specimen formed by numerous albite crystals, pericline variety, due to its elongated prisms and white color. Well defined, bright and arranged in a matrix colored by orange microcline and schorl. This aesthetic specimen belongs from the former collection of Peter Seroka (Girona).

90 €

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