tennantite

 
Pronunciation: /ˈtɛnəntʌɪt/

noun

[mass noun]
  • a grey-black mineral consisting of a sulphide of copper, iron, and arsenic. It is an important ore of copper.

Origin:

mid 19th century: from the name of Smithson Tennant (1761–1815), English chemist, + -ite1