出典:Wiktionary
出典:『Wiktionary』 (2026/01/28 19:39 UTC 版)
From Middle French turquoise, from Old French (pierre) turquoise (“Turkish (stone)”), from turc + -ois. The stone, mined near Nishapur in the Khorasan region of Persia, was originally brought to Europe through Turkey. Doublet of Turkish.
turquoise (countable and uncountable, plural turquoises)
turquoise (comparative more turquoise, superlative most turquoise)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/27 02:53 UTC 版)
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8·4H2O. 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, like most other opaque gems, has been devalued by the introduction of treatments, imitations, and synthetics onto the market.
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