Bismuth Rainbow Crystal Staircase - 1.806" rockinaboxpeanutwood The term “tephra” describes any

The term “tephra” describes any fragment of rock ejected from a volcano during a violent eruption

This specimen is a single jaw fragment from Merycoidodon culbertsoni

TYRANNOSAURUS REX (VERTEBRA)

Pterosaurs were the first vertebrate animals to evolve into flying creatures

Both black and brown background color choices are available

Bismuth Rainbow Crystal Staircase - 1.806" rockinaboxpeanutwood The term “tephra” describes anyBismuth 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. 806". While bismuth's practical uses are limited beyond some pharmaceuticals, the element's utterly unique colors and shape continue to