jinis
kimberlites basaltic lan kimberlites micaceous
Flint, jasper, radiolarite, chert umum, chalcedony, agate, onyx, opal, magadi-jinis chert, porcelanite, Sinter siliceous
fitur
tansah ditemokake minangka pipo vulkanik liwat lemah ndhuwur Continental jero, tuan rumah rock kanggo diamond, iku salah siji saka rock tuwa, lumahan asring mengilap
clasts Gamelan kanggo tutul, gampang pecah dadi lancip piring, tahan struktural dhuwur marang erosi lan iklim