The Isheyevo meteorite is a metal-rich carbonaceous chondrite (Bencubbin-like meteorite). History: One stone, weighing 16 kg, was found in Bashkortostan, Russia in October 2003, by a tractor driver in a field during harvest carrying in the Ishimbai region of Bashkortostan, close to the Isheyevo village.

The bencubbinite or CB chondrites are metal-rich carbonaceous chondrites. The CB are divided into two subgroups, the CBa and CBb subgroup. CBa chondrites are coarse-grained (up to 1cm) and contain 40-60 vol% of FeNi metal. CBb chondrites are fine-grained and richer in FeNi metal (>70 vol %). CBb’s also have CAIs, zoned metal grains and matrix lumps

Isheyevo is close to CHs and supports the genetic unity of the CR-CH-CB clan. In comparison with CHs, all CB’s lack POP chondrules.