Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Kugadzirwa kukuru kunonzi kwakaitwa naEdward Goodrich Acheson muna 1890. Acheson akanga achiedza kugadzira mangoda okuzvigadzira paakapisa musanganiswa weivhu (aluminium silicate) nepowdered coke (carbon) mumudziyo wesimbi. Akadana makristasi ebhuruu akaumba carborundum, achidavira kuti yaiva musanganiswa mutsva wecarbon nealuminium, wakafanana necorundum. Muna 1893, Ferdinand Henri Moissan akawana chicherwa cheSiC chisingawanzoitiki apo aiongorora mienzaniso yedombo yakawanikwa muCanyon Diablo meteorite muArizona. Chicherwa chacho chakatumidzwa kuti moissanite mukukudza kwake. Moissan akagadzirawo SiC nenzira dzinoverengeka, kusanganisira kunyungudutswa kwekabhoni musilicon yakanyungudika, kunyungudutsa musanganiswa wecalcium carbide nesilica, uye nekuderedza silica nekabhoni muvira remagetsi.  Mubvunzo: kugadzirwa kukuru kwakatanga rini?
Makore 1890