Abubuwan sinadaran na beads masu iyo sune galibi silicon dioxide da aluminum oxide.Yana da halaye da yawa irin su barbashi masu kyau, m, nauyi mai sauƙi, ƙarfin ƙarfi, juriya mai ƙarfi, juriya mai zafin jiki, rufin thermal da hana wuta.An yi amfani da shi sosai a Ɗaya daga cikin albarkatun kasa don masana'antar refractory.