| Cadmoselite | |
| Formula: | CdSe |
| Imasymbol: | Cds |
| Molweight: | 191.37 |
| Color: | Black to pale grey |
| Luster: | Adamantine – Resinous |
| Streak: | Black |
| Diaphaneity: | Translucent to Opaque |
| Gravity: | 5.47 |
Cadmoselite is a rare cadmium selenide mineral with chemical formula CdSe. Cadmoselite crystallizes in the hexagonal system and occurs as black to pale grey opaque crystals and grains.[1] [2]
It was first described in 1957 for an occurrence in Tuva. The mineral occurs as interstitial grains in sandstone formed under reducing alkaline diagenetic conditions.[1] [2]