Euxenite-(Y) is an uncommon oxyde of niobium with tantalum and titanium and Rare Earth Elements (REE), with some calcium and radioactive elements like uranium or thorium. These elements give it a radioactive activity. This specimen we offer you is a cluster of parallel growth crystals, well-formed, with a chisel termination.With the classic ocher patina. A good chance to get a fine and good sized specimen.

360 €

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On a matrix of polymetallic sulfides, primarily pyrite, are several druses of intensely lustrous, deep blue covellite crystals. These are accompanied by sulfur crystals, among other minerals. This specimen belongs from the Atalaya open pit, an emblematic mining operation in Huelva province.

Reserved

Druse of tabular torbernite crystals from this classic mine for the species. Good luster, translucent to traansparent, and with a very intense green color.

95 €

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Yellowish globular aggregates of this rare uranyl tellurite, whose type locality is this Mexican mine. It is accompanied by green aggregates of emmonsite. It comes with the David Shannon label (2003) and belonged to the Nicolau collection (Barcelona).

Reserved

On a matrix of polymetallic sulfides, primarily pyrite, are several druses of intensely lustrous, deep blue covellite crystals. These are accompanied by sulfur crystals, among other minerals. This specimen belongs from the Atalaya open pit, an emblematic mining operation in Huelva province.

On a sandstone matrix some yellow crusts of coconinoite formed by small tabular to micaceous crystals. These samples has been analyzed by SEM-EDS and we will send the results to the buyer.

Reserved

On a sandstone matrix some yellow crusts of coconinoite formed by small tabular to micaceous crystals. This sample has been analyzed by SEM-EDS and we will send the results to the buyer.

Reserved

Druse of tabular torbernite crystals from this classic mine for the species. Good luster, translucent to traansparent, and with a very intense green color.

A spectacular specimen of fergusonite-(Y), a somewhat unusual yttrium niobate, which typically occurs massively or in small crystals. In this specimen, several crystals can be observed growing in parallel. It belongs from the collection of Jean Béhier (1903-1963), a self-taught French mineralogist who amassed a collection of over 5,000 specimens, primarily of Madagascar minerals. This collection was formed through his numerous field studies and the many exchanges he made throughout his life. A top specimen for both the species and the locality.

ATTENTION: This sample will only be sent to buyers within the Iberian Peninsula or collect personally.

Nice monazite-(Ce) crystal, rich in faces, with luster and intense brown color. Nowadays finding specimens with this quality is not easy. These specimens have been analyzed, indicating that cerium is predominant, and that it is accompanied by other REEs such as lanthanum and neodymium, together with thorium, which gives it some radioactivity. We will send the results and label to the buyer.

100 €

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Nice monazite-(Ce) crystal, rich in faces, with luster and intense brown color. Nowadays finding specimens with this quality is not easy. These specimens have been analyzed, indicating that cerium is predominant, and that it is accompanied by other REEs such as lanthanum and neodymium, together with thorium, which gives it some radioactivity. We will send the results and label to the buyer.

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Nice monazite-(Ce) crystal, rich in faces, with luster and intense brown color. Nowadays finding specimens with this quality is not easy. These specimens have been analyzed, indicating that cerium is predominant, and that it is accompanied by other REEs such as lanthanum and neodymium, together with thorium, which gives it some radioactivity. We will send the results and label to the buyer.

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These specimens come from an old find in the Felhuns area, en Prada de Conflent. It was a skarn deposit where garnet veins appeared. Currently, it is completely prohibited to extract specimens, due, as is often the case, to the actions of irresponsible individuals who not only remove specimens but also damage the site. The crystals are dodecahedral, often beveled by the trapezohedron, very brilliant, with a very intense toasted honey color and some transparence. A floater. They have been analyzed, and the results indicate an andradite-grossular ratio of approximately 65-35% (RM333A analysis).

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These specimens come from an old find in the Felhuns area, en Prada de Conflent. It was a skarn deposit where garnet veins appeared. Currently, it is completely prohibited to extract specimens, due, as is often the case, to the actions of irresponsible individuals who not only remove specimens but also damage the site. The crystals are dodecahedral, often beveled by the trapezohedron, very brilliant, with a very intense toasted honey color and some transparence. Sawed at the back. They have been analyzed, and the results indicate an andradite-grossular ratio of approximately 65-35% (RM333A analysis).

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These specimens come from an old find in the Felhuns area, en Prada de Conflent. It was a skarn deposit where garnet veins appeared. Currently, it is completely prohibited to extract specimens, due, as is often the case, to the actions of irresponsible individuals who not only remove specimens but also damage the site. The crystals are dodecahedral, often beveled by the trapezohedron, very brilliant, with a very intense toasted honey color and some transparence. Sawed at the back. They have been analyzed, and the results indicate an andradite-grossular ratio of approximately 65-35% (RM333A analysis).

Sold

These specimens come from an old find in the Felhuns area, en Prada de Conflent. It was a skarn deposit where garnet veins appeared. Currently, it is completely prohibited to extract specimens, due, as is often the case, to the actions of irresponsible individuals who not only remove specimens but also damage the site. The crystals are dodecahedral, often beveled by the trapezohedron, very brilliant, with a very intense toasted honey color and some transparence. They have been analyzed, and the results indicate an andradite-grossular ratio of approximately 65-35% (RM333A analysis).

90 €

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These scheelite crystals are a classic of Asian mineralogy, but are very difficult to find today. In this piece, we see various octahedral scheelite crystals, along with very small fluorite crystals and some larger arsenopyrite clusters. It also contains muscovite. It fluoresces under UVSW light. It belonged to the collection of Arthur Didisheim (Switzerland).

Quartz vein-type tungsten deposit. The mine was started in 1902 and abandoned in 1973. The dumps were reclaimed in 2000 and are now mostly revegetated (MINDAT).

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Violan specimen from the first locality where this clinopyroxene variety was first described. It is a purple to purple-blue manganese-colored diopside, augite, or omphacite. This specimen we offer is accompanied by a Deyrolle (Paris) label, with the number #3606 (attached to the sample). The Deyrolle company began its business in 1831, led by Jean-Baptiste Deyrolle, with the production and sale of materials related to the natural sciences. This specimen is accompanied by a nice handwritten label.

The original name was "violan", introduced in 1838 by August Breithaupt. In 1867, Thomas Allison Readwin, in his Index to Mineralogy, misspelled the name with an "e" at the end, but it remained that way for the future.

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A very aesthetic specimen composed of numerous brilliant, tetrahedral chalcopyrite crystals. They are accompanied by sphalerite crystals. Particularly notable are some partially corroded hexagonal fluorapatite crystals, which fluoresce under UV-OL light. A brilliant specimen for magnification.

A mine in the southern part of the Huarón district, although not operated by the same company that works other Huarón area mines. "Alimon" mine is a misnomer sometimes encountered in the literature. Primarily hydrothermal Pb-Zn-Cu-Ag vein deposits. Located 3 km SSW of the Huarón mine.

110 €

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A highly aesthetic specimen composed of numerous lustrous, tetrahedral chalcopyrite crystals. They are accompanied by numerous cubic pyrite crystals with striated faces. Also present are black sphalerite crystals. Particularly notable are some partially corroded hexagonal fluorapatite crystals, which fluoresce under UV-OL light. A brilliant specimen for magnification.

A mine in the southern part of the Huarón district, although not operated by the same company that works other Huarón area mines. "Alimon" mine is a misnomer sometimes encountered in the literature. Primarily hydrothermal Pb-Zn-Cu-Ag vein deposits. Located 3 km SSW of the Huarón mine.

80 €

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Spectacular specimen of coronadite (analyzed) from this classic mine in southern Morocco. It consists of numerous globular and botryoidal aggregates of this manganese oxide with lead. The matrix is ​​barye and galena. A very aesthetic and good-sized specimen.

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Idiomorphic chalcopyrite crystal of considerable size, with defined faces and edges. Some show stepped growth. It is disposed very aerial on a matrix formed by transparent, brilliant, and elongated hyaline quartz crystals. It belongs from the Franco Betta collection (Torino, Italia).

Reserved

In this specimen, we can observe and enjoy numerous andradite crystals, of the green demantoid variety. Faceted, lustrous, and translucent. An Alpine classic. It belongs from the Didisheim collection in Switzerland.

170 €

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This specimen is a sample extracted from the mercury deposits of the Guelma area in Algeria, most likely before the mid-1950s. The accompanying handwritten label indicates that it comes from the Guelma area and from the collection of Jean Chervet (1904-1962). Chervet, whose name identifies the mineral chervetite, was a French mineralogist and collector, and director of the Mineralogy Service of the Atomic Energy Commission in France since 1948.
It is a compact piece of cinnabar, with red powdery crusts and small crystals. It is accompanied by colorless crystals of cerussite and yellow powdery 'bindheimite' (analyzed by SEM-EDS). Probably from Djebel Taya mercury mines. An interesting specimen as a species, provenance, and collection.

190 €

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