Massive specimen of dialogite, former name for rhodochrosite. This specimen is of historical interest along with the old label that accompanies it. The sites of the old mines are now largely obscured, but there are some overgrown dumps remaining in the forest.

Good-sized specimen of kermesite from this classic Slovak locality. It shows us the characteristic acicular aggregates of kermesite, with reddish reflections on a matrix with stibnite. The specimen comes from the E. Nicolau collection (Barcelona) and was acquired from Joan Viñals (Vilanova i la Geltrú).

150 € 100 €

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Aesthetic group of very bright vesuvianite crystals, with striated prisms truncated by pinacoidal faces. They are disposed very aerial on the matrix with grossular. From a Spanish locality known for its skarn (skarnoid) minerals. Prospecting works has been carried out in the area to investigate the possibilities of exploiting tungsten (scheelite).

Good size heliodor crystal. With a greenish yellow color, transparent to translucent, with some faces, some rounded and others more defined. A gem with the old label of former Lloid, by Hortensia Durán y Marçal Llòria (Barcelona). Photo is not very representative of the brilliance and transparence.

240 €

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These specimens of adamite are among the most aesthetic that this classic Mexican mine has offered us. Botryoidal aggregates of copper-bearing adamite, shiny and also forming sheaves. Under LW ultraviolet light they present an exceptional green fluorescence. Nowadays it is difficult to find specimens with this quality.

Excellent specimen formed by a large group of prismatic cerussite crystals completely covered by smithsonite crystals, rhombohedral and very bright. It is a very different piece from what can be seen in this classic Moroccan locality. A display specimen.

Good size crystal of pleonast, a variety of spinel containing Fe²⁺. It shows complex crystalline forms of the octahedron and combinations of the octahedron with the dodecahedron or, more rarely, with those of the cube. A museum size piece, very rare to get.

Classic and elegant specimen from Berbes, with book-shaped baryte crystals, yellowish white in color, on which various aggregates of cubic fluorite crystals stand out, very transparent and brilliant that allow us to see a violet colour zoning. On the back we can see a handwritten attached label.

110 € 70 €

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Group of prismatic arfvedsonite crystals, with parallel growth, striated faces and polycrystalline terminations, very shiny and dark green, almost black in color. Accompanied by minor feldspar as a matrix.

Group of prismatic arfvedsonite crystals, with parallel growth, striated faces and polycrystalline terminations, shiny and dark green, almost black in color. They are partially covered with feldspar. A curious specimen...

65 €

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Group of prismatic arfvedsonite crystals, with parallel growth, striated faces and polycrystalline terminations, shiny and dark green, almost black in color. In feldspar matrix. Nowadays it is difficult to get these samples.

55 €

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Group of prismatic arfvedsonite crystals, with parallel growth, striated faces and polycrystalline terminations, shiny and dark green, almost black in color. In feldspar matrix. Nowadays it is difficult to get these samples.

Specimen formed by a matrix of goethite (limonite) with cavities covered by calcite crystals accompanied by small, shiny black needles of plattnerite.

Good sized topaz crystal, colorless, richly faceted, brilliant, colourless and very transparent. It has some chips, but it is a gem.

60 €

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Group of rhodochrosite crystals included in the matrix. Bright and transparent. From this classic Peruvian mine.

Several ilvaite crystals on a druse of quartz crystals, with an intense black color, doubly terminated and twinned. Observing with the magnifying glass we can see perfect doubly terminated crystals, a pleasure. They are arranged in a very aerial way giving the specimen a notable elegance.

Specimen very rich in cassiterite crystals, very bright, richly faceted and of an intense dark brown color. The specimen has been repaired without affecting the interest of the specimen, from my point of view. A very interesting piece from these tin mines of the St Agnes mining district, an English classic.

A very aesthetic specimen of what are some of the most iconic cassiterites in the world, and certainly the most famous from Europe: Schlaggenwald (nowadays Horni Slavkov), have such an iconic appearance and this piece is no exception. It features a predominant, sharp, lustrous, cyclic twinned group crystals, in unusual peaked formation (result of twinning). 

220 €

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These hematite crystals from a quarry near Nador are already a classic of Moroccan mineralogy. This specimen is made up of various crystals in parallel growth, with exceptional brilliance, and showing the faces of different crystals. Its size and quality and metallic luster make them a definitive specimen from this locality. These hematites come from a small rhyolite quarry very near the community of Nador, on the road to Melilla.

150 €

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Group of carrollite crystals showing cube and octahedron shapes. Very bright and interpenetrated with each other. Defined edges and faces and exceptional shine. Very aesthetic.

The tin mine at Viloco (sometimes called Araca) has produced some of the most magnificent cassiterite specimens worldwide, and a very small percentage of these pieces are actually associated with tourmaline. This specimen hosts a few fine, sharp, lustrous, translucent, brown/black cyclic twinned crystals of cassiterite with small quartz crystals and small acicular greenish-black crystals of tourmaline (dravite?). This association is seen in only a handful of cassiterite specimens from this historic locality.

320 €

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In this specimen we can observe two very well defined anatase crystals, with the shapes of the tetragonal dipyramid truncated at the vertices by pinacoidal faces. The shine is excellent and they have an almost black color but with navy blue reflections when the light hits them. They are arranged in a very aerial way on a rock matrix covered by small tabular b alvite crystals between transparent and translucent and very brilliant.

125 €

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Group of skutterudite crystals of very good size, exceptional brilliance and forming parallel growths that resemble a rosette. An excellent piece from this classic Moroccan locality that surpasses many of the specimens I have seen.

210 €

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Very rich group of mimetite crystals, with an intense orange color, luster and transparency, with interpenetrated hexagonal crystals truncated by the pinacoidal faces.

Group of carrollite crystals showing cube and octahedron shapes, along with tetrahexahedron shapes. Very bright and interpenetrated with each other. Defined edges and faces and exceptional shine. Very aesthetic.

160 €

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