Bismuth Rainbow Crystal Staircase - 1.792" devonian 09" fossil fragment of the

09" fossil fragment of the Dimetrodon's iconic spine

06" polished Cleoniceras fossil from Madagascar

345" crinoid fossil plate that dates to about 323

Robert Bruce Horsfall

8 cm) long and 4

Bismuth Rainbow Crystal Staircase - 1.792" devonian 09" fossil fragment of 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. 792". While bismuth's practical uses are limited beyond some pharmaceuticals, the element's utterly unique colors and shape continue to