tennantite

Etymology
Originally named "gray sulphuret of copper in dodecahedral crystals" in 1817 by mineralogist James Sowerby.

Renamed in 1819 by William Phillips in honour of Smithson Tennant (1761-1815), an English chemist who discovered the elements iridium and osmium.

Tennant +

Noun

 * 1)  A sulfide mineral of iron, copper and arsenic that is an ore of copper

Translations

 * Finnish: tennantiitti