Bismuth Rainbow Crystal Staircase - 1.602" carboniferousplant 504" piece of agatized coprolite

504" piece of agatized coprolite or "dinosaur dung" from the Morrison Formation in Utah

000-year-old fossil imprint of a Metasequoia frond

It is estimated to be around 360

Filaments are 6 micrometers in diameter — 10× thinner than a human hair

one of the largest iron meteorites with the longest known strewn field on Earth

Bismuth Rainbow Crystal Staircase - 1.602" carboniferousplant 504" piece of agatized coproliteBismuth 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. 620". While bismuth's practical uses are limited beyond some pharmaceuticals, the element's utterly unique colors and shape continue to