A very rich specimen in arsenolamprite, a polymorph of arsenic. As a brilliant vein, grey in colour and with a metallic lustre, formed by lamellar crystals. It is surrounded by very dark grey arsenic. A rare species.

Sold

Acute, yellow to orange, transparent, dipyramidal powellite crystals. Accompanied by molybdenite in the matrix. Very fluorescent under UV short wave, with yellow tones.

Sold

Very good specimen of molybdenite from this locality in Madrid. It appears as well-defined, bright hexagonal crystals with axial growths. It is disposed very aerial on the pegmatitic rock matrix. Very difficult to see and from Joan Viñals col.

Sold

These specimens from Lục Yên were sold as humite or clinohumite, but later studies have shown that they are chondrodite. Chondrodite is a mineral in the humite group. It is closely related to clinohumite, humite and norbergite, and it is often found with one or more of these minerals. In this specimen the chondrodite shows faces and an orange color that stands out against the marble matrix with small red spinel.

Sold

Very aerial topaz crystal on a matrix of quartz and albite. The crystal has well-developed prism faces truncated by the faces of the dipyramids, with excellent transparency, uniform honey color and good luster. It has a small chip on the top back without affecting the quality.

Sold

This specimen was labelled as Directorio 8 mine, Tocopilla, by Dr. Joan Viñals (1951-2013) but in this mindat locality, clinoatacamite is not referenced. In this specimen we can observe several defined lenticular clinoatacamite green crystals, with transparence and brilliance, accompanied by brilliant gypsum and bluish lavendulan aggregates. Lavendulan is described in Directorio 8 mine.

Sold

Nice speciemen of callaghanite, a rare copper and magnesium carbonate, with a very characteristic cobalt blue colour. It shows a druse formed by numerous crystals. Accompanied by small orange-brown aggregates of pokrovskite, together with globules of hydromagnesite. It is accompanied by the Joan Viñals handwritten label.

Sold

Acute, yellow to orange, transparent, dipyramidal powellite crystals. Accompanied by molybdenite in the matrix. Very fluorescent under UV short wave, with yellow tones.

Sold

Specimen formed by interpenetrating cubic fluorite crystals that show well-defined cube faces and bevelled edges, with stepped and tile-like growths. With good luster, transparency and marked geometric colour zoning, ranging from sky blue inside the crystals to violet blue on the outside (very intense on some edges).

Sold

Specimen of fluorapatite from the famous Cerro de Mercado mine in Mexico. The main crystal is prismatic, terminating in the faces of the hexagonal dipyramid. The luster and transparency are excellent and the color is very intense greenish yellow. It is arranged on a calcite matrix containing elongated augite crystals.

Sold

This remarkable specimen shows a matrix formed by tabular barite crystals, partially covered with aggregates of tetrahedrite-(Zn) crystals, rich in Ag. With well-defined faces and edges, forming globular aggregates on the barite. A rarity.

Sold

Specimen of fluorapatite from the famous Cerro de Mercado mine in Mexico. It is presented as a prismatic crystal terminated by the faces of hexagonal dipyramids. The transparency and brilliance are excellent and the color is very intense yellow. It is arranged on a matrix containing hematite and small augite crystals.

Sold

Very good sized fluorapophyllite-(K) crystal. It shows prism faces truncated by the dipyramid. Very bright, transparent to translucent. On matrix with stilbite-Ca. A classic from India.

55 €

Buy

I initially classified this specimen as actinolite, but after some doubts I analysed it using SEM-EDS and X-ray diffraction (XRD). The results indicate that it is an aegirine, probably after arfvedsonite (striated prism...). A very good-sized specimen, with different crystals growing in parallel, shiny, with striated faces, and a clearly visible green colour. Pieces of this quality are almost impossible to obtain today. We will send the analyses to the buyer.

Sold

A very brilliant group of epidote crystals with an intense and deep green color. It shows a very rare habit for the species. We can observe psedo-octahedrical forms in one side and a flattened shape generated by a extremely developed frontal pinacoid. To increase its scientific interest we must say that it is magnetic due to magnetite inclusions.

120 €

Buy

Excellent specimen of bournonite from this classic Kosovar mine. Several crystals of this lead and copper sulfoantimonide are disposed on a matrix formed by brilliant crystals of pyrite, sphalerite and galena. The bournonite presents visible cyclic twins, semi-matt luster, with chalcopyrite.

220 €

Buy

A very good-sized specimen with an aggregate of brilliant aegirine crystals of an intense green, almost black colour, with well-defined faces and edges. It is accompanied by green fibrous crystals of arfvedsonite. They are disposed in a matrix of orthoclase crystals with quartz.

Sold

Initially, some lunar meteorites were found by a nomad while he was grazing in the Bechar DCA in Algeria. Adrián Contreras Gómez and Carlos Muñecas Muñoz organized a search expedition including four local people for 14 days in June 2022 in the area 9.0 km heading 94.7° from Bechar 003. A large number of pieces of different sizes were found at the surface and subsurface.
The cut face shows the interior has a brecciated texture composed of light-colored clasts within a darker matrix. Sample is a partially vesicular polymict feldspathic breccia composed of mm-sized lithic clasts and abundant shocked mineral clasts. Lithic clasts show poikilitic, granulitic and shock melted vitric brecciated textures. Additional minerals are: FeNi metal, ilmenite, troilite and rare phosphate minerals.
Bechar 007 30°53.62’N, 3°23.7017’O, Bechar, Algeria. Find: June 2022. Classification: Lunar meteorite (feldspathic breccia).

Sold

Specimen of purpurite with an intense violet colour. It is accompanied by other phosphates. In the words of Antonio Manuel Inácio Martins: -"Purpurite is lilac, triphylite is brown, rockbridgeite is green dark and stewartite is yellowed... crazy phosphates". Enjoy the sample.

Sold

Specimen of purpurite with an intense violet colour. It is accompanied by other phosphates. In the words of Antonio Manuel Inácio Martins: -"Purpurite is lilac, triphylite is brown, rockbridgeite is green dark and stewartite is yellowed... crazy phosphates". Enjoy the sample.

Sold

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Sold

Numerous rhodochrosite crystals are disposed on a druse of quartz crystals, defined, transparent to translucent. They present a very remarkable richness of faces, to be enjoyed under magnification, highlighting numerous reflection twins, with dull faces and bright faces alternating by geometry. A very aesthetic curiosity.

Sold

A large group of rhodochrosite crystals, with pointed scalenohedron shapes but with striated faces and a very aesthetic pearly luster. The pink-red colour is more intense inside the crystals. It seems that a second generation of rhodochrosite has covered the primary crystals. It is accompanied by crystals of hyaline quartz, together with colourless, well-defined fluorite cubes with opaline faces, except at the vertices, a curious geometry. Aesthetic piece.

65 €

Buy

Aesthetic specimen of cinnabar, of intense vermilion, found intimately interpenetrated between sheets of gypsum. Under magnification we can see the cyanbar inclusions through the transparent plaster. The specimen comes from this old mine near the Picos de Europa. Specimens like this are difficult to obtain.

Sold