Minerals > Ορυκτά [EN > EL]

nickel

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turquoise = τιρκουάζ (ή τυρκουάζ), κάλαϊς (ή κάλλαϊς ή καλλαΐτης), κν. γαλαζόπετρα, γυαλόπετρα, περουζές.

The substance has been known by many names, but the word turquoise, which dates to the 16th century, is derived from an Old French word for "Turkish", because the mineral was first brought to Europe from Turkey, from the mines in historical Khorasan Province of Persia. Pliny referred to the mineral as callais, the Iranians named it "pirouzeh" [...]
http://en.wikipedia.org/wiki/Turquoise
 
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