A very rich group of interpenetrated fluorite crystals with cubic forms with beveled edges by the dodecahedron. Very sharp and with a really intense color, that varies depending on the incident light, between blue-violet to purple. A high quality Spanish fluorite specimen, from my own collection.

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Group of tabular barite crystals showing well defined faces and edges, good transparency and excellent brilliance. Its color takes on a greenish gray shades due to inclusions. Observed under the microscope, you could see the presence of reddish acicular inclusions of hematite. This sample was published in the Mineralogical Record (Vol. 45, No. 1) as a novelty in the Munich Mineral Show 2013.

This specimen is from a former Italian collection of early last century, G. d'Anna. It is known that a so called Giusseppe d'Anna of Telve was a military hero of World War I (see minrec). Also accompanying label store minerals Freiberg Mining Academy (more info). This fact and quality make this sample very special. The piece presents a prismatic crystal of cerussite embedded in a galena matrix. A very interesting and historic specimen.

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Group of very sharp cerussite crystals presenting an interesting displaced cyclic twin. The piece, with good size, is a floater, translucent and with an excellent luster. It is very rich in faces and very aesthetic. It comes from the classic Tsumeb mine. With labels from former collections.

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This specimen shows a very rich group of small micaceous crystals of tyuyamunite, brilliant and intense yellow color, contrasting on the matrix. The piece was labeled as francevillite, but we have performed SEM-EDS analysis that refers to the tyuyamunite species. The results indicated the presence of uranium, calcium, vanadium, and few silicium, thus move away from the francevillite containing barium and lead, together with vanadium and uranium. Results will be send to the buyer. From a Spanish mine not well represented in collections.

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We always try to bring pieces from our travels to Switzerland. This curious specimen of siderite from the near Goms area is an example. This is a group of rhombohedral siderite crystals that show a curious and unusual curved parallel growth. They are partially covered by calcite and albite, accompanied by brilliant muscovite. From an unusual Swiss locality.

Group of very sharp fluorite crystals with good transparence and brilliance, with a bluish color, well disposed very aerial on a barite matrix. We would like to emphisize the size of the main crystal and its good definition, showing perfectly tetrahexahedron faces with an interesting slight curvature. A classic from Asturies.

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A huge size cuprian adamite specimen, formed by two druses of very brilliant small crystals with an intense brilliance and characteristic color, with stalactitic growths. On the back size of the specimen there are some isolated and more developed crystals of this arsenate. Really good for diplay.

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 this rare species.

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A very rich specimen of silver from a classic locality for the Catalan mineralogy. In this sample we could enjoy several groups of very sharp brilliant skeletal silver crystals. They are accompanied by acanthite aggregates of darker color. The specimen has been acidified with care since usually silver specimens become dark, but in this case, and looking at the date of collection, we can foresee a long stability. The label indicates that this material was mined in 1905, but the specimen was collected in 1998.

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This specimen shows several mineral species. The matrix which "supports" all of them is a group of huge size galena crystals with sharp cube-octahedral faces. Partially covering them we can see large groups of flattened realgar crystals. As alteration of these realgar crystals, due to the light, we have a patina, between yellow to orange, pararealgar. Between these galena crystals some orpiment aggregates, with a very intense yellow color.
We would like to emphisize in this specimen the presence of numerous seligmanite (PbCuAsS3) prismatic crystals, with a luster that makes them stand out. Evidently magnification is necessary to enjoy all their forms. Accompanied by chalcopyrite, pyrite and quartz. As you can see, it is a complete and representative specimen from this Peruvian mine.

In this specimen we can see some matrix cavities covered by botryoidal aggregates formed by wavellite crystals. Different layers of wavellite are observed. Its color is greenish yellow and more bluish in some areas by the presence of turquoise. They are partially covered by several small aggregates of lanceolate turquoise crystals (see photo) with a light blue color.

These wavellite and turquoise specimens have been analyzed by microprobe and we will send the results to the purchaser, with the SEM photograph of both species. Palazuelo de las Cuevas area is known worldwide for variscite, that were worked for making beads in the Neolithic period, it was 5.000 years ago.

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In this specimen we can see some matrix cavities covered by botryoidal aggregates formed by wavellite crystals. Different layers of wavellite are observed. Its color is greenish yellow. They are peppered by small aggregates of turquoise crystals with a light blue color.

These wavellite and turquoise specimens have been analyzed by microprobe and we will send the results to the purchaser, with the SEM photograph of both species. Palazuelo de las Cuevas area is known worldwide for variscite, that were worked for making beads in the Neolithic period, it was 5.000 years ago.

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In this specimen we can see some matrix cavities covered by botryoidal aggregates formed by wavellite crystals. Different layers of wavellite are observed. Its color is greenish yellow and more bluish in some areas by the presence of turquoise. They are partially covered by several small aggregates of lanceolate turquoise crystals (see photo) with a light blue color.

These wavellite and turquoise specimens have been analyzed by microprobe and we will send the results to the purchaser, with the SEM photograph of both species. Palazuelo de las Cuevas area is known worldwide for variscite, that were worked for making beads in the Neolithic period, it was 5.000 years ago.

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A very particular quartz crystal that shows a very marked "window" growths (also called "skeletal") in the rhombohedron faces and with a short prism. Very good glassy luster. With inclusions those are very common in this type of quartz crystals. These specimens were collected near the Urrúnaga reservoir in Legutio. Nowadays it is near impossible find these specimens.

Group of crystals, one of them clearly dominant, which shows a very marked "window" growths (also called "skeletal") in the rhombohedron faces. In the prism, underdeveloped, we can see echeloned to parallel growths. Excellent glassy luster. With inclusions those are very common in this type of quartz crystals. These specimens were collected near the Urrúnaga reservoir in Legutio. Nowadays it is near impossible find these specimens.

These curious specimens from Taouz mine were collected in February 2013. These cavities are covered by hexagonal prismatic crystals of greenish to yellow color, opaque to translucent, forming nice aggregates. Interestingly, some of the cavities are coated by brilliant small quartz crystals, giving an excellent contrast to the specimen. Iniatilly, these crystals were identified as pyromorphite, but after new SEM-EDS analysis, we can confirm that these crystals contain calcium, with chlorine, phosphorus and lead.

These curious specimens from Taouz mine were collected in February 2013. These cavities are covered by hexagonal prismatic crystals of greenish to yellow color, opaque to translucent, forming nice aggregates. Interestingly, some of the cavities are coated by brilliant small quartz crystals, giving an excellent contrast to the specimen. Iniatilly, these crystals were identified as pyromorphite, but after new SEM-EDS analysis, we can confirm that these crystals contain calcium, with chlorine, phosphorus and lead.

This is the first citation of this species in Taouz.

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Globular aggregates of mimetite crystals, with an intense luster and yellowish honey color. It is a floater and it back side there are some spherical vugs those are difficult to interpretate. Take a look. An aesthetic miniature from this famous Mexican mine.

This specimen is notable for several reasons. On the one hand a very nice franklinite octahedron, an unusual iron and zinc oxide, with good size, and curved and brilliant faces (17 x 17 mm). On the back side it has some fractures that allow us see the metallic luster. On a matrix of calcite. On the other hand, we have a doubly terminated prismatic crystal of willemite, also with good size (17 x 10 mm). Willemite species usually presents fluorescence, and in this case, under shortwave UV light (also in the longwave UV), it has an intense yellowish green color. Calcite from Franklin is also notable for the intense red-orange fluorescence. In one specimen we have two species with good crystals and size.

Druse of cubic fluorite crystals with yellow color. With some transparence to translucent. On the crystals we can observe different baryte aggregates formed by tabular white crystals. This specimen is notable for its locality where it is uncommon to find this association. A sample for fluorite and/or Spanish classic localities.

A floater. Group of interpenetrated cubic fluorite crystals with defined faces and beveled edges, and showing echeloned growths. Good brilliance, translucent and with color zoning between blue to violet, more intense in the crystal core and very intense in some edges. Accompanied with scalenohedral calcite crystals. A very aesthetic specimen with a good size. From a Spanish classic mine.

These malachite specimens come from works those were carried out in the railroad called "Basque Y". During these works, some rocks containing this mineral were extracted. They show prismatic radial aggregates of deep green malachite with an exceptional brilliance. Crystals are flattened due to its growth in fissures. Some transparency could be observed. Its origin is due to alteration of the original chalcopyrite matrix, present as small but brilliant granules, accompanied by hematite. The fibrous shape, color and luster make them very aesthetic.

A very brilliant and huge size crystallized primary malachite. The prismatic needle like crystals present diverging and fan-shaped groups and have an excellent luster. Color is very intense and characteristic with some zoning. With some matrix included in malachite. A very representative specimen and from a classic Katanga mining area.

A very brilliant crystallized primary malachite. The prismatic needle like crystals present diverging and fan-shaped groups and have an excellent luster. Good transparence. Color is very intense and characteristic with some zoning. A very representative specimen and from a classic Katanga mining area.