Ibyuma byinzibacyuho mubisanzwe bikwiranye nubutaka bukomeye bwa sima, cyangwa amagorofa yinganda zifite ubukana bwa Mohs hejuru ya 6, Bishobora gukuraho neza ibishushanyo byasizwe no gusya ibyuma, kugirango bihinduke neza mubikorwa byo gusya kandi hasi hasi yawe neza kandi yoroshye.