Kamacite is an alloy of iron and nickel, which is found on Earth only in meteorites. According to the International Mineralogical Association it is considered a proper nickel-rich variety of the miner
Widmanstätten pattern showing the two forms of nickel-iron minerals, kamacite and taenite
Kamacite and taenite after taenite, exhibiting the octahedral structure of taenite, Nantan (Nandan) iron meteorite, Nandan County, Guangxi Zhuang Autonomous Region, China. Size: 4.8×3.0×2.8 cm. The Nantan irons, a witnessed fall in 1516, have a composition of 92.35% iron and 6.96% nickel.