Garnet, yitwa ziyawu cyangwa ziyawu mu Bushinwa bwa kera, ni itsinda ryamabuye y'agaciro yakoreshejwe nk'amabuye y'agaciro na abrasive mugihe cya bronze.Garnet isanzwe ni umutuku.Garnet Icyongereza "garnet" ikomoka mu kilatini "granatus" (ingano), ishobora guturuka kuri "Punica granatum" (amakomamanga).Ni igihingwa gifite imbuto zitukura, kandi imiterere yacyo, ingano n'amabara bisa na kristu ya garnet.