I-crystal corundum enye inomphetho wokusika omacala amaninzi, ubunzima obuphezulu, ixabiso eliphakamileyo lokuqina, amandla aqinileyo okusila, ubushushu obuphantsi bokusila, ubomi obude bokusika, kwaye inokusebenza intsimbi eqinile kunye neqinile, njengentsimbi engenasici, isinyithi esinesantya esiphezulu se-vanadium, njl. Ikwafaneleke ngokukodwa...
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