This specimen shows stalactític aggregates of rhodochrosite with a pink color. They are accompanied by brilliant botryoidal kentrolite, with a deep black color. It is a rare lead and manganese silicate. Nice specimen for the species and dedicated to systematic and French collectors.

This specimen shows parallel growths on a single axis, so typical of the finds from N'Chwanning mine. The tetrahedral crystals are brilliant with very well defined faces and edges and showing echeloned and skeletal growths. Good size for species.

Very aesthetic group of aerial malachite crystals pseudomorphic after azurite showing a tabular shape with rounded faces. Color is deep green with a very well marked velvet luster. Good specimen from Milpillas.

Large group of cubic fluorite crystals showing well defined faces and edges. The yellow honey color, brilliance and transparency of the crystals give a very aesthetic touch to this piece. Viewed under magnification they are peppered by small globular aggregates of pyrite. It is accompanied by white dolomite.

In this specimen we have a very curious combination of erythrite forms. On the one hand, globular aggregates of this arsenate formed by needle like crystals with a velvet luster and a pale pink color. On the other hand, groups of lanceolated crystals with defined faces and edges, good transparence and deep purple color. All of them are disposed on a matrix with sharp cube octahedron skutterudite crystals. A fine specimen for this Moroccan locality.

A brilliant and very sharp bixbyite crystal. A manganese oxyde well-known and appreciated by collector for its rich crystallographic forms. In this specimen we can see the cubic main form with vertex truncated by trapezohedron and a small triangular octahedron face. A crystallographic pleasure... Very aesthetically disposed on a volcanic rocky matrix. With an old display label.

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Very curious group of interpenetrated leucite crystals pseudomorphosed by feldspar. A classic from Czech Republic appreciated by pseudomorph collectors. Good size.

Brilliant and elongated gold nugget that suggests rounded and flattened subhedric crystals. It belongs from an area known till the middle of last decade for its gold nuggets. The sample shows a good size. An opportunity to add a Spanish gold to your collection. Weight: 3.49 g. / 0,1231 oz.

Brilliant gold nugget that suggests rounded subhedric crystals and a surface with concavities. It presents quartz granules as inclusion. It belongs from an area known till the middle of last decade for its gold nuggets. The sample shows a good size. An opportunity to add a Spanish gold to your collection. Weight: 2.99 g. / 0,1055 oz.

A huge size specimen showing botryoidal aggregates of rosasite, with a velvet appearance and intense blue-green pastel tones. They are peppered with small but brilliant calcite crystals with a pseudooctahedron shape. On a limonite matrix.

Excellent group of doubly terminated aquamarine crystals showing a well developed prism and a very interesting terminal faces: the first order dipyramid truncated by the pinacoid. It has a slight bluish tone, near colorless. Transparence and brilliance are very good. With some unknown reddish inclusions (rutile?). Accompanied by some aquamarine doubly terminated crystals, albite-feldspar, dravite and colorless fluorapatite (between two V beryl crystals, see photo). A gemmy specimen.

A specimen formed by some tetrahedrite crystals of very good size. They show faces of the positive and negative tetrahedron, very sharp and rich in faces. Some of them are coated with a thin golden patina of chalcopyrite, a very aesthetic rarity. They are accompanied by bright calcite that partially cover with a geometrical disposition. A specimen of great aesthetic and interesting by the size of its crystals.

Mamellonar aggregates of smithsonite crystals with a very nice orange to brown color covering cavities in the rocky matrix. From a recent find (2014, april) in one of the biggest "cortas" (quarry) of Portmán mining area.

Mamellonar aggregates of smithsonite crystals with a very nice orange to brown color covering cavities in the rocky matrix. From a recent find (2014, april) in one of the biggest "cortas" (quarry) of Portmán mining area.

A curiosity that I found aesthetic and mineralogically interesting. Usually the menilite opals are found in a marlstone matrix, but in this case we found it included in gypsum with clay inclusions. A Spanish curious specimen...

Group of lenticular calcite crystals, very transparent and brilliant, with an uncommon shape for the species due to the flattened hexagonal shape. Disposed very aerial on the limonite matrix with hemimorphite.

Isolated fluorite crystal showing cube and octahedron faces with polysynthetic growths. Nice zoning violet to deep violet color. Good brilliance and transparence. On a matrix with small arsenopyrite crystals.

Good size sulfur crystal from a classic Spanish locality, but a not well-known outcrop. It shows very well defined faces and edges, good brilliance and an excellent canary yellow to slightly orange color. Disposed and protected in a vug vovered by calcite crystals. A fine Spanish sulfur specimen.

A fine lazurite specimen from the Type Locality: Sar-e Sang, Afghanistan. A group of very sharp blue-violet lazurite crystals, one of them dominant and very aerially diposed, contrasting white the calcite (marble) matrix, with larger crystals within the marble. They show dodecahedron faces and cube faces on the main crystal.
It must be said to be strict, that these crystals are really sulfide-rich haüyne. In the words of the recently published article about Sar-e Sang in Mineralogical Record (Vol. 45, 3), all specimens analyzed from Sar-e Sang contain some sulfide, but is nevertheless sulfate-dominant. Note that in nature is not described any sulfide-dominant lazurite. 

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Of this specimen I'm not sure if emphasize its size or defined faces and edges, or both. It is a sample for lovers of crystallography to those can give good moments! Brilliance, color, marked faces, rich in facets... An unique opportunity to have a crystal of this quality for the species.

A very interesting cluster of sharp epidote crystals showing a developed striated prism and parallel growth. Terminal faces are defined by various pinacoids. The brilliance is excellent and the deep green color, near black in thick crystals, could be perfectly observed when light crosses through them. From a Peruvian locality not well represented in collections. Take a look in Mineralogical Record Tom's Online.

A classic Spanish specimen not easy to find today. These crystals from Ariño were collected many years ago and today it is really difficult to find them as mines have been abandoned. This specimen belongs to a private collection and the owner extracted it in the 90s.
Crystal stands by its size, transparency and carbonaceous inclusions. In certain areas it shows forms of natural redisolution.

A rich group of lenticular gypsum crystals forming rosettes. Some of them are well developed but with another shape, lanceolated and showing swallowtail twin. These are very transparent, defined faces and edges and very aerial disposed on the matrix. Accompanied by some cubic halite transparent and colorless crystals.
Gypsum fluorescence under ultraviolet source is excellent, but the phosphorescence is the most intense and lengthy I've never seen before. An uncommon and aesthetic combination.

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Long wire silver crystal aprtially covered by greyish acanthite. It is very aerial disposed on a matrix with quartz, silver and some samll acanthite crystals. It has grown on a quartz crystal as a base. Very aesthetic.

Druse of tetrahedrite crystals with defined faces and edges. Good brilliance, with a metallic-gray tone. They show complex interpenetrating faces. Accompanied by groups of hyaline quartz crystals forming rosettes. Very aesthetic. With sphalerite in the matrix. From a classic Peruvian mine.