An kasu kashi uku: m, matsakaici da kuma daki-daki.Ƙarƙaƙƙarfan ragar jajayen baƙar fata ne, tsakiyar ragar ja ne mara nauyi, kuma lallausan ragar ja ne fari.Girman hatsin kowane raga iri ɗaya ne, kuma siffar hatsi iri ɗaya ce.Ana kiran shi crystal angular tare da kaifi gefuna da ƙarfin niƙa mai girma.

Don niƙa marmara da sauran kayan laushi a masana'antar dutse.

Masana'antar gilashi suna niƙa burar gilashi, bututun hoton talabijin, kayan aikin gani, ruwan tabarau, prisms, gilashin agogo, da sauransu.

Karfe masana'antu sandblasting, derusting, nika.Masana'antar buga littattafai suna niƙa faranti, kuma masana'antar haske suna sarrafa samfuran filastik, fata, takarda yashi da sauran su.

Ƙarfin niƙa na corundum na halitta yana ɗan ƙasa da na tanderun lantarki farin corundum, amma taurinsa yana da ƙarfi, kuma yana da halaye na yanki mai kama da harsashi.Amfaninsa shine babban santsi na sassan niƙa, ƙasa da alamun yashi mara zurfi.Wurin niƙa yana da kyau kuma daidai, wanda zai iya inganta ingancin samfurin, wanda shine nau'i na musamman na wannan samfurin.Emery na dabi'a yana da ɗan gajeren lokacin niƙa, babban inganci da ƙarancin farashi, wanda zai iya yin ƙarancin ƙarancin rayuwar sabis.