ıt is a fluosilicate of alumina, and is used as a gem

listen to the pronunciation of ıt is a fluosilicate of alumina, and is used as a gem
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Определение ıt is a fluosilicate of alumina, and is used as a gem в Английский Язык Английский Язык словарь

It is a fluosilicate of alumina, and is used as a gem
topaz