Iridescent Pyrite on Stilbite from Kazakhstan TF2272 erongo The lack of coloration emphasizes

The lack of coloration emphasizes calcite’s natural crystal geometry

often exhibiting a vitreous luster

This specimen is in great condition

Green opal gets its stunning green color from traces of nickel and other minerals that are present in the sedimentary rocks where it forms

and while both faces have been polished

Iridescent Pyrite on Stilbite from Kazakhstan TF2272 erongo The lack of coloration emphasizesIridescent Pyrite on Stilbite from Kazakhstan Approx. Dimensions: 3. 25x1. 5x1 inches Approx. Weight: 58. 6 grams Locality: Sokolovskoe Iron Mine, Kostanay Province, Kazakhstan This is a unique specimen we acquired out of a very small parcel of specimens from a gentleman that collected them in Kazakhstan. It features very brightly colored iridescent pyrite coating white stilbite.