Greenockite

Discovered in 1840, this mineral was named for Lord Greenock (1783-1859). It is the most common mineral containing cadmium, but it is found only in a few localities and in small amounts, usually as an earth-coating on zinc ores, especially sphalerite. Cadmium is used in alloys for antifriction bearings, low-melting alloys, and in electroplating.

Mineral Photos courtesy of R.Weller/Cochise College