fornacite

Etymology
From 🇨🇬, named in 1915 after (whose surname resembles 🇨🇬, which, like , is ultimately from 🇨🇬).

Noun

 * 1)  A rare monoclinic-prismatic lead copper chromate arsenate hydroxide mineral, which is generally green to yellow and translucent to transparent, and has a Mohs hardness of 2.3, a specific gravity of 6.27, and a Strunz classification of 7.FC.10.