Iron, Ataxite (IVB-ANOM). This beautiful meteorite was first found in the Chinga stream, a tributary of theUpper Yenisei, in 1913, near Tanna Tuva, Turvinskaya, Russia. It is a very nice rare nickel-rich (16.56%) Ataxite. "At nickel concentrations higher than 13 -14 percent the fine octahedrite structure grades into a microscopic widmanstatten structure that is not visible to the unaided eye...the meteorite is composed essentially of a fine-grained mixture of taenite and kamacite ie. plessite." Many specimens have now been found, most are ripped and torn like Sikhote-Alin shrapnel. Chinga is very nice when cut and polished to a near mirror finish. It is not widely in collections, but more has recently been found at the site and is now available to collectors. Total known weight of Chinga is estimated to be around 300 kilos.
Quote from "Rocks from Space" by O. Richard Norton