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Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl 6(PO 4) 4(OH) 8·4H 2O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue. Turquoise. General. Category.
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Turkoois (Turquoise)

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Het mineraal turkoois is een gehydrateerd koper-aluminium-fosfaat met de chemische formule CuAl₆(PO₄)₄(OH)₈·4. Het wordt om de blauwe kleur al sinds de oudheid gebruikt in sieraden. Wikipedia
Kleur: Blauw, groenblauw, appelgroen, lichtbruin
Bijzondere kenmerken: Bevat vaak mangaandendrieten
Chemische formule: CuAl6(PO4)4(OH)8·4(H2O)
Hardheid: 5 tot 6
Turquoise is a bright blue to blue-green mineral that has been used to produce gemstones and small sculptures for over 6000 years.
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Turquoise forms where mineral-rich water seeps into rocky gaps. Over time only the minerals remain—as turquoise. The copper in turquoise gives the gem its ...
Turquois is a hydrous phosphate of aluminum and copper CuO.3Al2O3.2P2O5.9H2O. Most turquoise has been found in deeply weathered and altered rhyolitic volcanic ...