A rare type of metal-rich carbonaceous chondrite meteorite; abbr. CB. Bencubbinites make up about 0.1% of all meteorite falls. They consist of olivine, orthopyroxene, and a greater proportion of metallic iron than any other chondrite meteorites. The CB_a subgroup are coarse-grained and contain 50% (by volume) metallic iron and centimetre-sized chondrules. The CBb subgroup are fine-grained and contain greater than 70% (by volume) iron-metal, millimetre-sized chondrules, and refractory inclusions. The mineral and isotopic compositions of the CB meteorites suggest they are closely related to the CR and CH subgroups of the carbonaceous chondrites. Bencubbinites may have formed through a giant impact between planetesimals in the early Solar System. They are named after a meteorite that was found in Bencubbin, Australia, in 1930.