Erlichmanite

Erlichmanite is the naturally occurring mineral form of osmium sulfide (OsS2).

It is grey with a metallic luster, hardness around 5, and specific gravity about 9.

[2] It is found in noble metal placer deposits.

[3] Named for Jozef Erlichman, electron microprobe analyst at the NASA Ames Research Center.

[4]