I roto i te tukatuka karāhe o ēnei rā, he mea nui te whakatutuki i tētahi āhua mata ōrite, ātaahua hoki, mō ngā mahi ataahua me ngā mahi. Kua puta ake te alumina ma kua whakaranua ki te kirikiri 180 hei mea whakakoi pai mō te pupuhi onepu karāhe nā tōna kaha tapahi taurite me te tohatoha rahi o te matūriki.
Me te rahi matūriki toharite o te 80–90 maikorona, ka tukuna e te alumina ma kua whakaranua ki te kirikiri 180 te pānga hukapapa pumau me te kore e nui te kino o te mata. Ko tōna parakore teitei (≥99% Al₂O₃) me te iti o te rino ka whakarite kia kore e puta he tae parauri, he poke rānei i te wā o te tukanga pupuhi, he mea tino pai mō ngā karāhe hoahoanga, whakapaipai, me ngā karāhe ahumahi kounga teitei.
Ko te āhua o te matūriki koki e whakarato ana i te mahi tapahi moroiti e taea ana te whakahaere, e āhei ai ngā kaiwhakahaere ki te whakatutuki i ngā mutunga maeneene, mātotoru me te ōritetanga tino pai. Ki te whakatauritea ki ngā mea whakakoi matotoru, ka tukuna e te kirikiri 180 te whakapaipai mata pai rawa atu, he mea tino pai mō ngā mahi pēnei i ngā panera karāhe, ngā whare kaukau, ngā wehewehenga, me te whakairo waitohu tino tika.
Hei tāpiritanga, ko tōna pakeketanga teitei (Mohs 9) me te ātete kaha ki te kakahu ka whai wāhi ki te roa o te ora ratonga me te āheinga ki te hangarua, ka whakaiti i ngā utu whakahaere whānui. Ina whakamahia i raro i ngā āhuatanga kua tino pai ake—i te nuinga o te wā i ngā pēhanga i waenga i te 0.4–0.7 MPa me ngā koki pupuhi tika—ka whakarite te alumina ma kua whakakotahihia ki te kirikiri 180 i te whai huatanga me te kounga.
I te mea kei te piki haere tonu te tono mō ngā whakaotinga karāhe kounga teitei, kei te noho tonu te alumina ma kua hanumihia ki te kirikiri 180 hei otinga pono mō ngā kaihanga e rapu ana i te tika, te ōrite, me te mahi whai hua i roto i ngā mahi pupuhi onepu.