تصنيف المعادن pdf | download free pdf
تصنيف المعادن, اسماء المعادن باللغه العربية. Agate variety of quartz) Alabaster variety of gypsum) Alexandrite variety of chrysoberyl) Allingite synonym of amber) Alum Amazonite variety of microcline) Amber fossilized resin) Amethyst purple variety of quartz) Ammolite organic; also a gemstone.
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