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Mirrorstone Crystals - Crystals and fossils of the natural world.

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Turquoise

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Turquoise - SKU_A_1403

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Availability: In stock

Special Price £95.00

Regular Price: £110.00

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From: England, exact location unknown.

Hardness: 5-7 on the Mohs scale.

Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium. As a secondary mineral, turquoise apparently forms by the action of percolating acidic aqueous solutions during the weathering and oxidation of pre-existing minerals. For example, the copper may come from primary copper sulfides such as chalcopyrite or from the secondary carbonates malachite or azurite; the aluminium may derive from feldspar; and the phosphorus from apatite. Climate factors appear to play an important role as turquoise is typically found in arid regions, filling or encrusting cavities and fractures in typically highly altered volcanic rocks, often with associated limonite and other iron oxides.



WeightDepthWidthLength
0.555kg 4cm 10cm 10cm