Brilliant botryoidal hematite specimen. In the back side we observe very esthetic concentric growths of different colours, fibrous, of hematite. These pieces have been cleaned in origin with sand which eliminates the surface oxide layer to let us see these spherical forms of good size. Very curious Moroccan novelty.

Group of very sharp and tabular wulfenite crystals, with an excellent brilliance, color varies between orange to red and from translucent to transparent. They are disposed as rossettes very aerial on a matrix of goethite. Main crystallographic forms we can be observe are the first and second order tetragonal pyramids, truncated by the pinacoidal faces.

Senegalite is a rare aluminium phosphate. In this specimen we can observe several prismàtic transparent crystals on blue turquoise. This specimen is from the type locality for the species.

Huge size gypsum twinned crystal from a classic Spanish locality. From the Manchion collection (Barcelona).

A combo that Trepča supplies to the world of mineral collecting. In this specimen we have rhodo crystals with pink tone, well defined. They're partially covering sphalerite crystals, of intense brightness, with defined crystals of galena. Very thin quartz crystals forming rosettes and upholstered areas of delicate boulangerite filaments. Calcite flattened rhombohedral crystals with a greyish tone. A very aesthetic and interesting sample.

Pure brilliance, shining crystals, pure aesthetics. This specimen is formed by several sphalerite crystals, very, very bright, complex and of intense black color. When the light falls on them, the reflections are amazing. They are accompanied by lenticular siderite that gives a touch of contrast with the sphalerite. Some scattered crystals of arsenopyrite. A piece that will stand out in the showcase; turn it over with your hand hand under the light and enjoy.

Specimens of libethenite from Miguel Vacas mine are seen in the market, but with this size of crystal, brilliance, sharpness and color not really many of them can be find, but rather few. You do not need a magnifying glass to enjoy the pseudo-octahedral crystals of this phosphate. It is accompanied by pseudomalachite, as is usual for the locality, and on a quartz matrix. A first quality one, yes!

Usually these imperial topaz appear without matrix. In this specimen we can enjoy a prismatic crystal, doubly terminated by the pinacoids, with brilliance, transparence and intense color. With small ding in lateral face. It is gemmy from top to bottom.

Very esthetic specimen formed by some groups of prismatic crystals of adamite, contrasting on a matrix of goethite. The crystals have a very uniform yellow color, with transparency, with very well defined faces and edges and forming rosettes. We can also observe isolated doubly terminated crystals and some almost colorless. A pleasure under the loupe magnifying glass. Good size.

Very esthetic specimen formed by some groups of prismatic crystals of adamite, contrasting on a matrix of goethite. The crystals have a very uniform yellow color, with transparency, with very well defined faces and edges and forming rosettes. We can also observe isolated doubly terminated crystals and some almost colorless. A pleasure under the loupe magnifying glass. Good size.

These are brilliant aggregates of gold formed by numerous crystals rich in faces, curved faces and disposed on a matrix of quartz. The SEM-EDS analyzes show that this gold contains a small percentage of silver (<1% weight). They are accompanied by fibrous aggregates of malachite and gray bornite crystals. This specimen stands out for the contrast between the brilliant gold and the green/gray matrix. An exceptional piece. Bleida is a mine located on the eastern rim of the Bou Azzer district.

Glaucophane is an unusual species member of the amphibol group. This Italian locality is known worldwide for the good specimens of this species. It is usually covered with calcite, which once removed shows sculptural aggregates of striated tabular to prismatic translucent crystals, with an intense bluish-gray color, almost violet. In the cavities appear small orange crystals of rutile and groups of chromian muscovite (var. fuchsite). Pyrite crystals also can be found. A good sized and very aesthetic combination from this classic locality.

Glaucophane is an unusual species member of the amphibol group. This Italian locality is known worldwide for the good specimens of this species. It is usually covered with calcite, which once removed shows sculptural aggregates of striated tabular to prismatic translucent crystals, with an intense bluish-gray color, almost violet. In the cavities appear small orange crystals of rutile and groups of chromian muscovite (var. fuchsite). Pyrite crystals also can be found. A good sized and very aesthetic combination from this classic locality.

Glaucophane is an unusual species member of the amphibol group. This Italian locality is known worldwide for the good specimens of this species. It is usually covered with calcite, which once removed shows sculptural aggregates of striated tabular to prismatic translucent crystals, with an intense bluish-gray color, almost violet. In the cavities appear small orange crystals of rutile and groups of chromian muscovite (var. fuchsite). Pyrite crystals also can be found. A good sized and very aesthetic combination from this classic locality.

Glaucophane is an unusual species member of the amphibol group. This Italian locality is known worldwide for the good specimens of this species. It is usually covered with calcite, which once removed shows sculptural aggregates of striated tabular to prismatic translucent crystals, with an intense bluish-gray color, almost violet. In the cavities appear small orange crystals of rutile and groups of chromian muscovite (var. fuchsite). Pyrite crystals also can be found. A good sized and very aesthetic combination from this classic locality.

This English specimen shows us a group of calcite crystals, one of them of larger size, interpenetrated, twinned, with a color between honey to white. With defined faces and edges, translucent. In the back it shows a exfoliated part. A sample from a mine not well represented in collections. From the Adrian collection, a dealer and collector from the United Kingdom. Label will be send with specimen.

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A very aesthetic specimen that shows a vug in the matrix, partially covered by tabular lanceolated crystals of erythrite with a good size. They are disposed very aerial in elegant radial aggregates. Intense color and transparence. A sample of very good quality and that under increase makes us enjoy these arsenates.

Rich group of roselite crystals, with an intense color and good transparence. The analyzes indicate that it does not contain Mg and for the shape of the crystals everything indicates that it is roselite. Accompanied by calcite scalenohedral crystals and globular aggregates of green cobaltaustinite.

Rich group of roselite crystals, with an intense color and good transparence. The analyzes indicate that it does not contain Mg and for the shape of the crystals everything indicates that it is roselite.

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Good sized group of rutile crystals from this classic North American locality for the species. They show very defined facets, excellent brilliance, with transparencies and reddish reflections. With forms of contact with the matrix and other accompanying crystals. An opportunity to get a historical piece.

Very esthetic "plume" formed by strontianite crystals, with parallel growths, visible terminal faces and translucent. It is disposed very aerial on a snowy dolomite matrix covered by small dolomite crystals. An European classic highly appreciated by collectors. It has a slight yellowish fluorescence under SW-UV.

Group of very aesthetic vivianite crystals, forming rosettes, on a bivalve as a matrix, very visible. These specimens were found in levels of phosphorus ochres accompanied by other phosphates, east of the Crimean peninsula, in the well-known Kerch iron-ore deposits. Very curious.

Groups of topaz crystals aesthetically disposed on a rhyolite matrix. Some of them isolated and very rich in faces. They show very well defined faces and edges, with an excellent transparency and a uniform tone. From a classic locality.

Samples of the tungsten mine of the Parrilla are very difficult to obtain today. This specimen comes from the Manchion collection and was acquired from Dr. Joan Viñals in 1991. It shows us a druse of quartz with groups of arsenopyrite crystals stand out, with very well defined faces and edges, good brightness, interpenetrated and complete. The Parrilla was a large tungsten mine, nowadays inactive. With the Manchion handwriten label.

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Brewsterite belongs to the group of zeolites, but it is an unusual species. This specimen comes from the type locality for the species. The sample is partially covered with prismatic crystals, transparent to translucent (a wonder under magnifying glass), very defined and forming aesthetic aggregates.