minerability

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Rough Turquoise! Newest member of my collection.

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Dark Kyanite and a stunning Aragonite.

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Blue Lace Agate and Leopard Jasper.

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Grossular, it's a garnet variety. Garnets are generally originated by metamorphism, and are index for the conditions of pressure and temperature that the rock were exposed. These specimens were find in schists from northeast of Brazil.

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Hexagonal emerald crystal incrusted in mafic matrix.

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Red muscovite, rarest color for a mica, caused by hematite inclusions, showing beautiful geminations, its associated with hornblende and actinolite in matrix.

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Bicolor fluorite, shows alternate colors variations caused by different chemical inclusions in the mineral structure. It's a evaporite formed by precipitation of dissolved ions of calcium and fluor in association (CaF2).

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Turquoise -  CuAl6(PO4)4(OH)8·4H2O; Cryptocrystalline and blue-to-green specimen.

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Rutilated Quartz.

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Iridescent Moonstone pendant. The True Moonstone is a variety of Albite, a Feldspar from Plagioclase series; Albite - NaAlSi3O8.

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Just Perfection! The most beautiful Amethyst I have ever seen. In this druzy the Amethyst is associated with prismatic Calcite crystals. Belongs to a college classmate.

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Quartz, Acicular Epidote and Orange Garnet (Spessartite - Mn3Al2(Si3O12))

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(Left to Right) Apatite, Sodalite and Blue Quartz.

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New Amethyst druzy, the Purple color is effect of Fe2+ inclusions in the crystals.

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Cubic crystals in gemination, Pyrite and Limonitized Pyrite.

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Detail of the Quartz Crystals in the center of a Agate Geode.

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This color is sublime! New Aquamarine specimen,