Diamonds have been reported from alpine-type ultramafic rocks and chromite ores by the authors in 1980. But unfortunately so far the reported diamonds in Tibet are unconfirmed. This paper deals with the new occurrence and characteristics of diamonids, which are recovered from chromite ores in the luobusa ophiolite. About 25 grains of diamond and alout 70 sorts of associated minerals have been discovered, including native elements: Cr, Cu, Ni, Fe, C, Si, Au, Pb, W, Ir, Os, Ru; Alloys: Fe-Ni, Fe-Co, Fe-Mn, Fe-Si, Fe-Ni-Cr, Fe-Ni-Co, Cr-C, Si-C, Ir-Os, Os-Ir, Os-Ir-Ru, Fe-Pt, and silicate and sulfides.