Description
Two areas with pyrite after pyrrhotite, with a beautiful pale pink rhodochrosite layer, fluorescent calcite and cubic pyrite, from Trepca Mine Complex, Mitrovica, Kosovo.
The calcite fluoresces with 365nm long wave UV light.
Size: 87 x 68 x 27 mm. 154 grams.
Pyrite after pyrrhotite pseudomorph is a mineral specimen that shows the replacement of pyrrhotite by pyrite, preserving the original shape and structure of the former. Pyrrhotite is an iron sulfide mineral that often forms hexagonal or pentagonal crystals, sometimes resembling roses. Pyrite is another iron sulfide mineral that has a higher sulfur content and a cubic crystal system. Pyrite is more stable than pyrrhotite and can replace it through a chemical reaction, resulting in a pseudomorph.