Granite igizwe niki?Granite ni urutare rusanzwe rwinjira mubutaka bwisi, Biramenyerewe nkibara ryijimye, ryera, imvi, numukara wumutako.Nibyoroshye- kugeza hagati.Amabuye y'agaciro atatu yingenzi ni feldspar, quartz, na mika, bibaho nka silver ...
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