An excellent old classic from the American mineralogy. Really sharp crystals of hübnerite forming groups of parallel growths, some of them isolated. Translucent, with the intense brown color and brilliance and an esthetic contrast with the snowy white matrix. Nowadays, it is very difficult to find specimens with this quality and size... From a former Austrian collection.

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On a sandstone matrix some yellow crusts of coconinoite formed by small tabular to micaceous crystals. This sample has been analyzed by SEM-EDS and we will send the results to the buyer.

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Excellent specimen of rhodochrosite from this classic American locality from where not many specimens are available, unless they appear in former collections. This piece entered the Joan Astor collection in 1976 and was acquired from Joan Montal, a well-known old dealer from Vilafranca del Penedés (Barcelona). Several rhombohedral rhodo crystals, very well defined, with a very aesthetic pink color. With a globular aggregate of a second generation of rhodo. It stands out on the matrix of quartz crystals. A unique piece.

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For uranium mineral collectors, this carnotite of an intense yellow color, formed by numerous globular aggregates of crystals, covering the surface of the sandstone matrix. An American classic, labeled E. Kucera (Barcelona).

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On a sandstone matrix some yellow crusts of coconinoite formed by small tabular to micaceous crystals. This sample has been analyzed by SEM-EDS and we will send the results to the buyer.

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An excellent old classic from the American mineralogy. Really sharp crystals of hübnerite forming groups of parallel growths, some of them isolated. With the intense brown color and brilliance and an esthetic contrast with the snowy white matrix. Nowadays, it is very difficult to find specimens with this quality or any other quality...

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