Marka la barbar dhigo corundum brown iyo corundum cad, hal corundum crystal ayaa leh engegnaan sare, adkaansho, hal qayb qaab crystals spherical, iyo iska caabin xoog leh u qaybsanaan.
Midabka hal corundum crystal waa huruud khafiif ah, nooca wax soo saarkuna waa crystals hexagonal
Waqtiga boostada: Abriil-28-2023