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Hloov xuab zeb
Round quartz xuab zeb yog ua los ntawm ntuj quartz los ntawm kev sib tsoo.Nws muaj siab Mohs hardness, puag ncig hais tsis muaj lub kaum ntse ntse thiab flake hais, siab purity tsis impurities, siab silicon cov ntsiab lus thiab hluav taws kub.
