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. 5x85o

350 €

Buy

We highlight the locality of this specimen, unusual in collections, a granite quarry located north of the Porriño batholith. It consists of several good-sized microcline crystals partially covered by aggregates of foliaceous clinochlore crystals. It comes from the Jaime Murria collection (Barcelona).

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.

45 €

Buy

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

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.

Reserved

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

The Eugi dolomite crystals are a classic of Iberian mineralogy. In this specimen, we can see numerous rhombohedral crystals covering the matrix, some of them larger, with very clean and marked edges and faces. Their transparency and luster are remarkable. Some of them are interpenetrated.

A specimen composed of several good-sized microcline crystals with well-defined faces and edges, accompanied by white albite crystals. A group of smoky quartz crystals with good luster and transparency stands out at the top. This specimen comes from the collection of Peter Seroka (Potsdam, 1942 - L'Escala, 2020), a well-known German collector residing in Catalonia and a lover of feldspars.

85 €

Buy

This specimen comes from the Nicolau collection in Barcelona and was acquired from the well-known Barcelona mineral dealer, Enric Kucera. The specimen shows an intricate group of stibnite crystals that are almost completely transformed into stibiconite. It is accompanied by Kucera's label.

Reserved

A curious specimen composed of several prismatic microcline crystals, some of them interpenetrated by something resembling a Carlsbad twin. They are partially coated by globular aggregates of opal, which fluoresce strongly under ultraviolet light. This specimen comes from the Peter Seroka collection and was acquired in 2007 from Allan Fraser.

Reserved

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

In this specimen, we can observe various smoky quartz crystals, with a very uniform colour and exceptional transparence. They are disposed on a feldspar matrix, accompanied by various prismatic aegirine crystals with striated faces and a very intense black color. This specimen belongs from the Jaime Murria collection (Barcelona).

Reserved

The amethyst quartz specimens from this old Murcia mine are highly prized among collectors. In this specimen, we can see various doubly terminated quartz crystals, with the amethyst color showing some zoning, more intense at the tips. The luster is very good.

Reserved

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.

70 €

Buy

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.

100 €

Buy

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.

80 €

Buy

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.

75 €

Buy

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.

110 €

Buy

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