cooperite

[ koo-puh-rahyt ]
/ ˈku pəˌraɪt /

noun

a mineral, sulfide and arsenide of platinum, occurring in igneous rocks in the form of steel-gray crystals.

Origin of cooperite

after R. A. Cooper, who described it in 1920; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019