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Cacholong
Cacholong, also known as Kalmuck Agate, is a form of common opal, although it is often mistaken for agate or chalcedony. A milky white colour with a Mohs hardness of about 6, it is used for carving, cameos, etc. Found in Austria, Czech Republic, Mongolia and Uzbekistan, its name possibly comes from a river in Uzbekistan. ==External links==
*(Mindat.org entry on Cacholong Opal )
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Cacholong」の詳細全文を読む
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