A classic of Spanish mineralogy. Pantoja aragonites are known for their arrangement in the cavities of this gray marl, forming groups of prismatic crystals in divergent aggregates and with intense fluorescence under UV-LW light. In this specimen crystals have a very good size and are presented in several cavities in the matrix.

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This huge size kernite specimen is formed by some glassy and translucent cleavage crystals. It is a rare borate, named after the namesake California county where it was discovered. It is extremely rare in sharp crystals. These crystals are not formed in the borate deposit itself, but rather in the tanks that are used to dissolve the borax. Every few years the tanks are shut down for maintenance. Kernite and primary tincalconite crystals are found growing on the large stirring blades and the walls of the tank. From the former Renaud Vochten collection (label will be send to the buyer).

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A elongated vug lined with small calcite crystals on which are scatterd some radial clusters of acicular yellow to orange crystals of boltwoodite. This specimen is labeled as Rössing mine but during many years excellent boltwoodite samples were labeled as "Rössing" and thus confused with the Rössing Uranium mine in the area (which never produced any boltwoodite specimens). The correct locality is Goanikontes, a uranium claim 4 km SE of Goanikontes and 27 km E of Swakopmund, at a distance of 40 km from the Rössing Uranium Mine.

Group of isolated and very sharp metatorbernite crystals, with an intense green grass color, showing the combination of the first and the second order dipyramids, truncated by pinacoidal faces. Its intense color gives a nice contrast with the white quartz matrix. We could say that this locality is included in the most worldwide important torbernite localities due to the crystal quality, size and multiple habits. Rare on the market.

Almandine crystal group, rich in faces, with forms of the dodecahedron, and rounded edges. Partially covered by gold mica. A classic of Spanish mineralogy, nowadays very difficult to see.

These specimens of fluorite are very unusual in the market. Groups of octahedral fluorite crystals truncated by cube faces, defined, bright and transparent to translucent. There is an aesthetic color zoning, between colorless to slightly greenish with predominant violet tones on the cube faces, a real curiosity. It is accompanied, to add interest if possible, by globular foliaceous aggregates of bright pink cookeite, a member of the chlorite group. Both minerals are very fluorescent under UV-LW light.

This specimen of sepiolite comes from what is considered the most important deposit of this mineral in the world.

A aesthetic good size cluster specimen of pyrite crystals really brilliant, defined faces and edges and with a spectacular luminosity. With some quartz. The picture can not collect all the brightness of the specimen. From a recent find (2016) in this classic Peruvian mine.

In this specimen we can enjoy brilliant aggregates of brown transparent römerite crystals, a very rare iron sulphate. They are accompanied by coquimbite showing an intense violet color under fluorescent light or LED type. They're accompanied by numerous yellow metavoltine/copiapite crystals, along with minor fibrous halotrichite. Note that under the magnifying glass we can navigate in a world of brilliant crystals, some of which of krausite species (yellowish to grey transparent). We left this identification pleasure to the collector. Regarding its environmental stability, this sample has been stored during more than six years without further alteration.

Near to a floater, this specimen shows tabular crystals of baryte in parallel growth, in book-shape, very brilliant, transparent and richly faceted. Between colorless to slightly gray due to inclusions. It comes from a locality that is rarely represented in collections (also in Spanish ones).

A good sized specimen partially covered by several libethenite crystals, very bright and accompanied by pseudomalachite. Under loupe we can observe pseudo-octahedral crystals, with transparency and intense green color. From a classic Portuguese mine exploted since Roman times.

In this fine quality specimen we can observe several groups of galena crystals of good size, with defined faces and edges, and cube and octahedron faces. Very, very brilliant and disposed very aerial on the matrix. They are accompanied by another galena group showing the spinel twin and a pseudohexagonal shape. Partially covered by dolomite rhombohedrons. An aesthetic specimen that combines cubic crystals and twin. Amazing...

Huge size almandine crystal, rich in faces, with forms of the dodecahedron, and rounded edges. A classic of Spanish mineralogy, nowadays very difficult to see.

From a locality not well represented in collections, we can enjoy this specimen formed by several fibrous aggregates of actinolite (byssolite), brilliant and with a greenish color. Disposed on a matrix with quartz and albite.

Very rich specimen of orange-brown radiated agregates of tokkoite. Accompanied by lilac fibrous charoite and minor black aegirine. From the type locality - Magistral'nyi area of Sirenevyi Kamen' charoite deposit. This deposit of alkaline pegmatites is located in the confluence of Tokko and Chara rivers, which give the name to both species of this sample. Very rare...

Delhayelite is a rare phyllosilicate from the Khibiny massif, in the heart of the Kola peninsula. This area is well known for the large number of alkaline pegmatites that have contributed to the mineralogy a large number of new species. This specimen shows the classical form of the fibrous to laminar shape, with brilliance and a very intense orange fluorescence under the long-wave UV light, characteristic of the specimens of Khibiny. A mineral rarity.

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Several radial aggregates of tabular flattened weeksite crystals, of intense yellow color and transparency. Some of these aggregates are covered by chalcedony. With dendritic pyrolusite. They are accompanied by orange aggregates of carnotite crystals. It is a uranium-vanadium mineralization in fine-grained sedimentary and volcanic rocks. Analyzed specimen.

The specimens of uranium species from Katanga are increasingly difficult to find on the market, and many of them come from former collections. This specimen comes from one of these old collections. It shows a rich group of kasolite crystals, with very defined lanceolate forms and intense yellow color. They stand out for their perfection and brilliance. They are accompanied by tetragonal prismatic crystals of wulfenite with an intense orange color, dipyramidal truncated by basal pinacoid, also very brilliant and translucent to transparent, one doubly terminated. To give a touch of color, more if possible, several crystals of torbernite with an intense green color, transparent and brilliant. A quality specimen that will satisfy the systematic and aesthetic collector.

Group of well developed ettringite crystals showing a pseudohexagonal prism, rich in terminal faces. This specimen has a rare toasted honey tone for the species and it is believed to be due to exposure to sunlight out of the mine. This sample is accompanied by many sharp manganite crystals, very brilliant, some twinned, and with an intense black color. An unusual specimen for this classic mine collected in 1985.

Leiteite is a very interesting zinc arsenate, one of the preciated rare species for Tsumeb Mine, which is the type locality. This is a elongated foliated to fibrous with pearlescent sample, with some transparence to translucent. This specimen was collected early 80s on mine level 44. A superb and really large specimen of this very rare mineral.

Rich specimen formed by several groups of linarite prismatic crystals, some isolated and doublye terminated, others forming aesthetic aggregates in rosette. With an intense blue color, very characteristic. They are accompanied by numerous prismatic aggregates of brochantite crystals, of intense green color, together with globular malachite. Very aesthetic and amazing under magnifying glass.

Rich group of prismatic crystals of linarite, which form brilliant rosette aggregates with an intense blue color, very characteristic. They are accompanied by several globular aggregates of malachite, with a light green tone, together with groups of very brilliant, transparent and prismatic crystals of brochantite. Very aesthetic specimen with a good quality for this species.

Group of fluorite crystals with an intense green color, with transparence, brilliance and sharp edges and faces. Transparence allows us to see an opalescent crystal core on which the crystal has grown with greater transparency. They are disposed isolated on the matrix which gives a superior quality to this specimen. It is accompanied by small rhombohedral calcite crystals and some crystals of pyrite totally pseudomorphed by goethite. Very fluorescent. On a matrix with quartz crystals. Samples with this fine quality are very difficult to find, considering that the quarry is closed to the collectors and the works have been interrupted. From a classic locality.

Very brilliant group of interpenetrated cube-octahedral skutterudite crystals, with very well defined faces and edges. They are included in a matrix with pinkish dolomite, NOT acidified. Very aesthetic and sized.

I purchased this specimen more than 10 years ago to the dissapeared dealer Baikal Geo (Madrid). It consists in a rich group of fibrous to prismatic aggregates of brilliant, transparent to white cerussite on a goethite matrix. This specimen is labeled from Trevellance mine, a very old Cornish mine worked for some time during the 1840s. Very interesting specimen from a rare English locality.