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.

Very aesthetic group of tabular baryte crystals, with a delicate blue color, brilliant and transparent. Damage free, with some goethite inclusions. Very aerial disposed on the matrix.

Very aesthetic group of tabular baryte crystals, with a delicate blue color, brilliant and transparent. Damage free. Very aerial disposed on the matrix.

Group of sharp fluorapatite crystals of good size showing parallel growth, an elongated prism with vertical striations, and multiple terminal faces truncated by the pinacoid. Good brilliance, translucent and a very distinctive greenish yellow color. They present numerous inclusions of flattened prismatic deep black crystals, also vertically striated and opaque. SEM-EDS analyses indicate that they probably belongs to the hornblende group, most likely magnesio-ferri-hornblende. We will send analysis to the buyer. A very aesthetic and aerial shape specimen.

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Group of sharp fluorapatite crystals of good size showing an elongated prism with vertical striations, and multiple terminal faces truncated by the pinacoid. Good brilliance, translucent and a very distinctive greenish yellow color. They present numerous inclusions of flattened prismatic deep black crystals, also vertically striated and opaque. SEM-EDS analyses indicate that they probably belongs to the hornblende group, most likely magnesio-ferri-hornblende. We will send analysis to the buyer. A very aesthetic and aerial shape specimen.

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Aesthetic anglesite specimen that shows a rich group of crystals with a razor-sharp chisel terminations, striated faces characteristic of the species, very sharp and with good transparency and colorless. This specimen date to the late 1970s and were found in the well known Moroccan mining area of Touissit.

Good sized almandine crystal, with defined faces, with forms of the dodecahedron and rounded edges. It is partially coated by mica. It presents molds of contact with other crystals those growth with. A former specimens, nowadays very difficult to get, a classic for the Spanish mineralogy.

If something I like about the world of selling minerals is to find specimens lost in the nooks of old collections. This sample is a case of this. It is an Australian piece, of good size, formed by a druse of ferro-axinite crystals, not very big, but with an excellent color and transparency. They are accompanied by calcite and curious milky quartz. The specimen comes from a locality located NW of Queenstown, Tasmania, a big skarn that was worked by their sulfides: pyrite, pyrrhotite, arsenopyrite, chalcopyrite. Under the calcite ferro-axinite appeared... But a long time ago.

Brilliant specimen of this Peruvian mine with a good size. It is a druse of quartz and calcite crystals, very bright and showing a bluish tone due to they are covering chrysocolla. Over them, we can see numerous groups of bright green clinoatacamite crystals. Well defined faces and edges, interpenetrating and isolated. A fine quality specimen, colorfull and with aesthetics.

Rich group of globular aggregates of mimetite, with an intense orange color. Good size. It comes from an area of the German Black Forest where nowadays it is forbidden collect minerals.

Very sharp dipyramidal scheelite crystals those are coated by lemon yellow stolzite. They are disposed on a flattened hübnerite crystal partially covered by quartz crystals. Pure aethetic specimen.

Very sharp dipyramidal scheelite crystals those are coated by lemon yellow stolzite. They are on a matrix of quartz crystals. A very interesting and aethetic miniature.

Group of sharp vivianite crystals forming aggregates. Excellent brilliance and intense deep green color, visible at the terminal faces of the crystals. These minerals appear in phosphate vein, in fossiliferous areas, the phosphate source.

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Iceland was known historically for its zeolites, before than Indian ones flood the collections. In this old specimen of "desmin" we can enjoy a group of sharp stilbite crystals, with good size and notable luster. On matrix. A piece for leading mineral collectors.

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This specimen is really interesting not only for the quality of the crystal but the locality it comes from. Few specimens are represented in collections. This sample shows a brilliant metallic luster and sharp faces and edges. Located in a gully, this locality consists of outcropping hydrothermally-altered and weathered Wooltana volcanics containing veins and pockets of zeolites, calcite and crystallised ilmenite.

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Brilliant group of chalcopyrite crystals, twinned and with complex forms, but with well defined faces and edges. The golden color, with iridescence, indicates that it is a "old" specimen. The piece comes from an interesting and classic English locality where few chalcopyrite specimens are known with this quality. These specimens were obtained at the beginning of XX century, it is a very "old" mineralogical sample from Clemens A. Winkler, german chemist who discovered the Germanium.

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Defined beryl (var. emerald) crystal in a matrix micasquist. The color, transparency and luminosity of beryl are quite good. It shows a defined prism with top pinacoidal faces. The specimen is significant as a locality piece.

An old specimen collected in the 50s by L. Gautron in the pegmatite dikes those are located about 20 km SW of the city of Antsirabé, in the main highland of Madagascar. It is a euxenite-(Y) crystal showing defined faces and rounded edges, with good size. A historical specimen.