Corundum kahawia, calundine corundum, na zirconium corundum louvre bidhaa:
Corundum kahawia, calundine corundum, na zirconium corundum louvres hubadilishana na magurudumu yenye umbo la resin. Wana elasticity kali, upinzani mkubwa wa kukandamiza, upinzani wa kunama, kunoa vizuri mwenyewe, kiwango cha juu cha kusaga, na kelele ya chini. Inafaa kwa polishing na polishing ya chuma, chuma, chuma cha pua, chuma cha kutupwa, aluminium, kuni, plastiki na zingine zisizo za metali.