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. 2p3t3t

65 €

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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 €

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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 €

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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.

40 €

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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.

55 €

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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. We can observe folds called stigmatic, produced by the entry of a viscous fluid (variscite) into a less viscous one. 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 €

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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

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 €

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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).

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

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 €

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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.

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 €

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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 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 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 €

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This specimen shows numerous lustrous, parallel-growing cylindrite crystals (Pb₃Sn₄FeSb₂S₁₄). It is accompanied by lighter gray acicular of incaite, a tin-rich Sn(II) franckeite variety (Pb,Ag)₄Sn₄FeSb₂S₁₅, which grow interlaced in the cylindrite. It is from the type locality for both species.

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 €

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Leightonite is a rare copper sulfate with calcium and potassium, K₂Ca₂Cu(SO₄)₄·2H₂O, formed in arid climates, as is the case with this specimen from the type locality of Chuquicamata mine in Chile. This specimen shows various greenish areas of this mineral. The specimen was collected by mineral dealer G. Farber in 1988, and later acquired from David Shannon by Catalan collector E. Nicolau.

Reserved

Rich clusters of sharp schwartzembergite orange lenticular crystals. It is a very rare lead cloroiodate, Pb₅H₂(IO₂)O₄Cl₃. Under magnification we can see some percylite bluish aggregates. It is one of the specimens those ed Dr. Joan Viñals (1951-2013) brought and studied from his trip to Chile in beginning of 2000's. This specimen comes from the E. Nicolau collection (Barcelona).

Reserved

Intense green paratacamite crystals from a Chilean mine where the species has been well identified. The crystals are prismatic, sharp, lustrous, and transparent. A very good specimen for the species.

These specimens were acquired and identified by the ed Dr. Joan Viñals (1951-2013), who brought them back from a trip to Chile in the early 2000s. We can see radial aggregates of parasymplesite, Fe²⁺₃(AsO₄)₂·8H₂O, which, according to the label, are intensely lustrous and blue-green in color. They are most likely accompanied by symplesite. A representative specimen from the E. Nicolau collection (Barcelona).

Reserved

These specimens were acquired and identified by the ed Dr. Joan Viñals (1951-2013), who brought them back from a trip to Chile in the early 2000s. We can see radial aggregates of parasymplesite, Fe²⁺₃(AsO₄)₂·8H₂O, which, according to the label, are intensely lustrous and blue-green in color. They are most likely accompanied by symplesite. A representative specimen from the E. Nicolau collection (Barcelona).

Reserved

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'a 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.