The only color change Fluorite. The mine is now ...
Huge piece peppered with chalcopyrite from Missouri Approx ...
Stunning 6" h x 3.5" wide x 3" deep at base prox
Stunning yellow calcite from 400 MYO approx 4.5" H x 3" w ...
Pilbara, Austrlia - Approx 9.5" x 4.5" x 5/8" thick A form ...