Indabyo z'umuhondo Onyx ni nziza-nziza ya Onyx ifite umucyo. Ibara ryacyo ahanini ni umuhondo woroshye, rimwe na rimwe rivanze nu mitsi yijimye kandi yera, yera kandi nziza. Imiterere yibi bikoresho irihariye, yoroshye kandi irasa, kandi ifite agaciro gakomeye. Indabyo z'umuhondo onyx zifite ishusho nziza, hamwe nimirongo imeze nkimirongo ikwirakwijwe hirya no hino, biha abantu umunezero mwiza. Bikunze gukoreshwa kumitako itandukanye, harimo urukuta, hejuru-hejuru, hasi, kumeza, kumadirishya, nibindi. Indabyo yumuhondo onyx nayo ifite ibisobanuro byikigereranyo mumico gakondo yubushinwa. Bikunze gufatwa nkikimenyetso cyibyiza, ubwiza nibyishimo, bityo bikundwa cyane nabantu.