Petr Hykš:
Pyrite FeS2
Petr Hykš:
Pyrite FeS2
Petr Hykš:
Pyrite FeS2
Petr Hykš:
Pyrite (microcapture) 45x
Petr Hykš:
Possible (pseudomorphosed?) pyrite crystals with chalcopyrite rims in devonian calciturbidite