These specimens from the Turó de Montcada quarry are characterized by a breccia-like appearance formed by ampelitic slate cemented with variscite, thanks to the hydrothermal fluids that circulated between them. It shows a polished section that can allow us to observe different colour tones, between green and white. This led us to consider the possibility of an alteration of the variscite that had converted it into crandallite, but X-ray diffraction studies determined that it was dehydrated variscite with minor strengite. We will send the analytical results to the buyer.

50 €

Buy

A good-sized tremolite crystal, transparent and with defined faces, doubly terminated. The prism has a rhombus cross-section. Specimens of tremolite from this Afghan locality are highly prized for their gem quality.

A group of brilliant pseudohexagonal chalcocite crystals, one of which stands out for its size and definition. These specimens, considered among the finest in the world, come from the M'Passa mining area in the Republic of the Congo, near the border with the Democratic Republic of the Congo. Many of the mining operations closed in the 1980s, but new workings have yielded exceptional specimens like this one.

In this specimen, we can see numerous tabular ferberite crystals with a very unusual orientated parallel growth. Very lustrous and intensely black in color, they are arranged on a matrix of clear quartz crystals. This specimen comes from the Nicolau collection (Barcelona) and was acquired from Dr. Joan Viñals.

85 €

Buy

This specimen of menilite opal is very characteristic of this Granada locality. We can see different rounded figures, dolls, or ninots (in Catalan), which have adhered to each other to form a single piece. A curiosity of Spanish mineralogy.

This specimen of menilite opal is very characteristic of this Granada locality. We can see different rounded figures, dolls, or ninots (in Catalan), which have adhered to each other to form a single piece. A curiosity of Spanish mineralogy.

Kusachiite is an extremely rare binary copper(II) and bismuth(III) oxide with a chemical formula CuBi₂O₄. This sample belongs from the Type Locality: the well-known Fuka mine in Japan.
This sample is rich in radial aggregates of kusachiite crystals, with a deep brown to black colour and contasting on the matrix. They are accompanied by calcite, quartz and other species like cahnite (SEM), bismite and chiyokoite (A. Petrov confirmed). We have carried out some SEM-EDS analysis and Raman. With these spectroscopical techniques we have confirmed the presence of the species. We will send all analytical reports to the buyer.

350 €

Buy

These specimens from the Turó de Montcada quarry are characterized by a breccia-like appearance formed by different fragments of ampelitic slate cemented with variscite, thanks to the hydrothermal fluids that circulated between them. We can see different colour tones, between green and white. This led us to consider the possibility of an alteration of the variscite that had converted it into crandallite, but X-ray diffraction studies determined that it was dehydrated variscite with minor strengite. We will send the analytical results to the buyer.

60 €

Buy

These specimens from the Turó de Montcada quarry are characterized by a breccia-like appearance formed by different fragments of ampelitic slate cemented with variscite, thanks to the hydrothermal fluids that circulated between them. We can see different colour tones, between green and white. This led us to consider the possibility of an alteration of the variscite that had converted it into crandallite, but X-ray diffraction studies determined that it was dehydrated variscite. We will send the analytical results to the buyer.

65 €

Buy

Numerous bright, orange, dipyramidal wulfenite crystals are disposed on a goethite matrix. They are accompanied by aggregates of calcite crystals. It comes from the Joan Astor collection, who bought it from Eugeni Bareche in 1974, both collectors and mineralogists from Barcelona.

Reserved

Fehrite is a new species found in Almeria (Spain). Years ago (2012) we identified this species in the Les Ferreres mine (Camprodon) but unfortunatelly we didn't have enough sample to finish detrmination and structural studies. Recently we found some more samples and the characterization was carried out based on the results obtained from the application of various analytical techniques: SEM-EDS, Raman and X-ray diffraction. Les Ferreres mine is the second locality worldwide for the species. We will send all reports to the buyer. In this Catalan mine, fehrite appears as elongated elongated tabular to fibrous crystals, with a delicate bluish-green tone, and fibrous terminations. Usually, it is accompanied by devilline (blue) and brochantite (green). It is the magnesium analogue of ktenasite.

50 €

Buy

An old Spanish specimen pyromorphite formed by numerous crystals, with hexagonal prism shape and a very characteristic yellowish-green colour. The luster is very good. These specimens are difficult to see in the market. It is accompanied by a handwritten label in German.

120 €

Buy

A very aesthetic and classic specimen of the hard to find and attractive chalcopyrites from the Friedrich-Wilhelm Mine. This specimen shows a brilliant, metallic, semi-iridescent, brass colored crystals of chalcopyrite scattered on the underlying quartz matrix. Richly faceted, with complex forms on the chalcopyrites. Very old material. From the former J. Vilaseca collection (Barcelona).

260 €

Buy

A fine specimen of cinnabar from the classic Spanish mine, Escarlati, in León. This specimen shows various aggregates of interpenetrating mercury sulfide crystals, with good color and visible octahedral shapes. They are arranged on a porous matrix that had been covered with calcite but was removed chemically. Only in this way can we enjoy these crystals. It comes from the Jaime Murria collection (Barcelona).

110 €

Buy

Lovely orange groups of highly lustrous heulandite crystals. Crystals form together beautifully to create these highly aesthetic clusters of unusually orange crystals. Lustre is fantastic for the species.

60 €

Buy

A very rich group of octahedral pyrite crystals, with exceptional luster and well defined faces and edges. Accompanied by sphalerite. This mine is the origin of the base for the "Ballon d'Or" award, awarded each year to the world's best football player.

Reserved

A group of octahedral pyrite crystals, of good size, with exceptional luster and very defined faces and edges. It is accompanied by sphalerite crystals. The base of the "Ballon d'Or," awarded annually to the best player in the world, comes from this mine.

Reserved

A very rich group of octahedral pyrite crystals, with exceptional luster and well defined faces and edges. Accompanied by sphalerite and quartz. This mine is the origin of the base for the "Ballon d'Or" award, awarded each year to the world's best football player.

Reserved

A rich group of cuboctahedral pyrite crystals, with exceptional luster and very defined faces and edges. It is accompanied by sphalerite and quartz. The base of the "Ballon d'Or," awarded annually to the world's best player, comes from this mine. Very good size and remarkable quality.

Reserved

A very rich group of octahedral pyrite crystals, with exceptional luster and well defined faces and edges. This mine is the origin of the base for the "Ballon d'Or" award, awarded each year to the world's best football player.

70 €

Buy

An exceptional specimen composed of several pyrite crystals, one of which stands out for its size, with a very remarkable luster. We observe interesting crystallographic growths that show the cube faces with triglyphic striations and the smooth octahedron faces. It is accompanied by small, lustrous quartz and sphalerite crystals. A very interesting piece from both an aesthetic and crystallographic point of view. The basis of the "Ballon d'Or," awarded annually to the best player in the world, comes from this mine.

Reserved

In this specimen, we can observe several hexagonal pyrrhotite crystals that have been completely replaced by pyrite. The luster is very good, and they stand out in a matrix formed by numerous quartz crystals. With black sphalerite. A very interesting and aesthetic pseudomorphosis.

100 €

Buy

The anatase crystals from this Norwegian locality are a classic of world mineralogy. They are notable for their size. In this specimen, we see a crystal formed by a tetragonal bipyramid truncated at the vertices by pinacoids. Growth contacts and some small chips can be observed, but they do not detract from the quality of the specimen. It is disopsed very aerial on a small quartz matrix.

In this specimen, we can observe numerous rosette-shaped aggregates formed by lenticular rhodochrosite crystals, with a faint pink hue that contrasts with a matrix composed of numerous quartz and calcite crystals, some of them flattened rhombohedrons. It is accompanied by several faceted crystals of brilliant chalcopyrite. A highly aesthetic specimen from this classic Kosovo mine.

Sold

Aesthetic slab of chalcedony, a translucent cryptocrystalline variety of quartz, with layered growths, blue-gray tones, and botryoidal. It belongs from the Jaime Murria collection (Barcelona).

55 €

Buy