@doktrock@toad.social2026-09-17 17:49:55
Sphalerite (var schalenblende) from the Pomorzany Mine, Olkusz, Poland. A favorite desk specimen, given to me by a mine geologist there.
Exhibits typical concentric brown to yellow fine grained mineral layers, along with galena, pyrite. #MinCup26 #MineralMonday ⚒️
