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727" dinosaur gastrolith from the Morrison Formation in Colorado
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Bismuth Rainbow Crystal Staircase - SOLD 1.904" mug 727" dinosaur gastrolith from theBismuth is an element (Bi 83) best known for its unusual staircase shape, the result of bismuth atoms attaching to the edge of a rapidly growing crystal. This is called hoppering, when atoms are drawn to the edge of a structure, creating a lattice formation. This specimen is a Bismuth Rainbow Crystal, measuring 1. 904". While bismuth's practical uses are limited beyond some pharmaceuticals, the element's utterly unique colors and shape continue to
