Agate ndeye microcrystalline yakasiyana-siyana ye silica, kunyanya chalcedony, inoratidzirwa nekunaka kwezviyo uye kupenya kwemavara.High kuchena natural agate yeBrazil (97.26% SiO2) inokuya midhiya mabhora, isingapfekeri uye inodzivirira kune acids (kunze kweHF) uye inonyungudutsa, mabhora aya anoshandiswa chero nguva shoma shoma yemasampuli inoda kukuyiwa pasina kusvibiswa.Saizi dzakasiyana dzeagate yekukuya mabhora aripo: 3mm kusvika 30mm.Iwo anokuya midhiya mabhora anoshandiswa zvakanyanya kune muminda yeCeramics, Electronics, Chiedza Indasitiri, Mushonga, Chikafu, Geology, Chemical Engineering uye zvichingodaro.