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Aguamarina con turmalina negra de Namibia

Aguamarina con turmalina negra de Namibia

“Iron-Rose” Hematite from Switzerland

“Iron-Rose” Hematite from Switzerland

La calcite est un cristal biréfringent, c'est à dire que la lumière s'y propage de façon anisotrope : en fonction de son orientation.

La calcite est un cristal biréfringent, c'est à dire que la lumière s'y propage de façon anisotrope : en fonction de son orientation.

Fluorite, phantomed, Cave in Rock, Illinois

Fluorite, phantomed, Cave in Rock, Illinois

Halita azul e silvinita

Halita azul e silvinita

Eritrina / Marruecos

Eritrina / Marruecos

Azurite with Malachite

Azurite with Malachite

smithsonite and hemimorphite

smithsonite and hemimorphite

Blue Fluorite with Barite - China

Blue Fluorite with Barite - China

Cuprite, a copper mineral that was not known until 1845, is a secondary mineral of oxidizing sulfide-rich copper deposits. It's symmetry is in the Isometric system, but this specimen looks to have unequal axes of symmetry. This slightly more than one inch crystal is from Bisbee, Arizona.

Cuprite, a copper mineral that was not known until 1845, is a secondary mineral of oxidizing sulfide-rich copper deposits. It's symmetry is in the Isometric system, but this specimen looks to have unequal axes of symmetry. This slightly more than one inch crystal is from Bisbee, Arizona.

Dioptasa sobre Duftita y Calcita

Dioptasa sobre Duftita y Calcita

topacio

topacio

Aguamarina con Muscovita

Aguamarina con Muscovita

La gama de colores que se muestran en la fluorita es igualado por pocas otras piedras preciosas .

La gama de colores que se muestran en la fluorita es igualado por pocas otras piedras preciosas .

Acquamarina (varietà i Berillo) with muscovite  Nagar, Hunza Valley, Gilgit District, Northern Pakistan.  320x180 mm

Acquamarina (varietà i Berillo) with muscovite Nagar, Hunza Valley, Gilgit District, Northern Pakistan. 320x180 mm

Drusy Thunderegg

Drusy Thunderegg