A very brilliant sulfur crystal disposed on a white dolomite and marble matrix. Well defined faces and edges, a little bit curved, good transparence and excellent classic yellow color. These specimens appear in vugs inside the Carrara marble quarries and it is not easy to get them without breaking them. An Italian gem.

Botryoidal aggregate of hydrozincite of white color, with yellow and bluish tones. We can observe different layer growths and radiated structures in fracture zones. It comes from a Basque very wide mining area not well represented, in this species, in collections.

Group of bluish fluorapatite crystals, showing well defined faces and edges. Some of them show defined prism and even hexagonal pyramid faces. Although the site is known, it is not easy to find samples on matrix with a good size and luster ... and on matrix, because it is very easy, when you work them, that crystals fall out. They are transparent to translucent with nice color zoning, more intense in the center of the prism. They are usually accompanied by quartz. In this sample we have a very nice crystal doubly terminated very aerial disposed on the quartz.

Group of bluish fluorapatite crystals, showing well defined faces and edges. Some of them show defined prism and even hexagonal pyramid faces. Although the site is known, it is not easy to find samples on matrix with a good size and luster ... and on matrix, because it is very easy, when you work them, that crystals fall out. They are transparent to translucent with nice color zoning, more intense in the center of the prism. They are usually accompanied by quartz.

Group of bluish fluorapatite crystals, showing well defined faces and edges. Some of them show defined prism and even hexagonal pyramid faces. Although the site is known, it is not easy to find samples on matrix with a good size and luster ... and on matrix, because it is very easy, when you work them, that crystals fall out. They are transparent to translucent with nice color zoning, more intense in the center of the prism. They are usually accompanied by quartz. In this specimen we have a huge size crystal (8 mm) with prism faces, but not complete on terminal ones and smaller one (3 mm), defined and rich in faces.

On a matrix partially covered by quartz, isolated groups of cinnabar crysrtals; with an intense luster and deep red color. We note that some of them have interesting cyclic twins. One of them features that make this sample remarkable is the locality and the numerous crystals.

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A really interesting specimen for its aesthetics, its locality and, of course, by the presence of this rare beryllium silicate, bertrandite. Specimen shows prismatic flattened crystals, well defined, forming rosettes. Perfectly disposed on a matrix of smoky quartz crystals and some brilliant pyrite.

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Group of fluorite crystals with an intense luster, violet tones with color zoning more intense in the crystal core and geometric in faces. They show polysynthetic growths on faces that give them a particular shape. With some minor damages on some edges, but overall aesthetic. The sample is from an old German collection. A Spanish classic.

Group of very sharp interpenetrated fluorite crystals, with cubic faces showing echeloned forms. The violet-purple color is very intense, but when light passes through them it shows transparence and color zoning, intense in the external faces of the crystal and slight green tones inside. Good luster.
This specimen, that comes from an old German collection and was collected in the mid-80 in the mining area of ​​La Collada, is very distinctive and it isn't easy to see similar in the mineral market. Its color and disposition make it very atractive to fluorite collectors. A  former classic specimen from Asturias.

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Brilliant fribrous aerinite aggregates, with a blue color with greenish tones. Usually aerinite from this classic locality is layering fissures in the dolerite rocky matrix. In this sample, the development of the fibers and its luster make it an excellent representative for the species. From a classic Spanish locality.

Group of very sharp cerussite crystals showing a reticulated growth, like a star or a snowflake, with good brilliance. Very aerial disposed. These specimens belong to a chance finding that yielded a few specimens of this quality. From the well-known mining area of Tharsis.

Group of very sharp cerussite crystals showing a reticulated growth, like a star or a snowflake, with good brilliance. Very aerial disposed. These specimens belong to a chance finding that yielded a few specimens of this quality. From the well-known mining area of Tharsis.

Group of very sharp cerussite crystals showing a reticulated growth, like a star or a snowflake, with good brilliance. Very aerial disposed on a stalactite goethite. These specimens belong to a chance finding that yielded a few specimens of this quality. From the well-known mining area of Tharsis.

Druse of very sharp baryte crystals showing developed and striated prismatic faces, truncated by pinacoids. The crystals are translucent, and color varies between colorless to yellowish. Excellent brilliance. Similar specimens were classified, many years ago, as hokutolite (a lead-rich baryte variety) but further analysis showed that there was only a minor lead content.

A huge size native copper specimen showing an arborescent growth of deformed crystals. Some of them still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Laminar growth of deformed and flattened native copper crystals. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Group of very sharp pyrolusite tabular crystals showing polysynthetic growths, unusual for the species. Good luster, metallic gray color. The echeloned faces gives them a different aesthetics. In the matrix we can observe more classic acicular radiated pyrolusite crystals.
Few specimens were obtained and, at first, it was thought that by their shapes and color tones they were marcasite, but further analysis characterized them as pyrolusite. Probably the best pyrolusite Spanish specimens.

This pyrite crystal is disposed very aerial on a brilliant hematite and pyrite matrix. It is not always usual find specimens from this Italian mining area placed on the matrix. Pyrite crystal shows pyritohedron classic forms with complex growths on faces. Its luster and gold color is good and it shows defined faces and edges. An excellent opportunity to have a sample from this classic locality.

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

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 a flattened shape generated by a extremely developed frontal pinacoid. Some small epidote crystals have grown in one face. Excellent luster. To increase its scientific interest we must say that it is magnetic due to magnetite inclusions.

This sample is one of the first amethyst quartz specimens were found in the Les Mallorquines area, near of the well known quartz crystals area of Sils and Massabé quarry. They come from outcrops and not of any mining works. The crystal is a floater and is partially recrystallized. It shows well developed rhombohedral terminal faces and, as usual, some bright faces and other dull. Good transparence. A historical specimen from this area found in the middle 80's.