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Deutsche Türkis {m} [min.] Synonyme

aquamarin  Âblaugrün  Âkobaltblau  Âtürkis  Âzyan  

Englische turquoise Synonyme

 

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Turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of copper and aluminium, with the chemical formula CuAl6(PO 4)48·4H 2O. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue. In recent times, turquoise has been devalued, like most other opaque gems, by the introduction onto the market of treatments, imitations, and synthetics.