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on the Bridge of Sighs
The images here are representative only
Knightia specimens often appear in large clusters known as mass mortality plates
trilobites
Above: Rough Sapphires from the Mini Museum Collection
Bismuth Rainbow Crystal Staircase - SOLD 1.55" gemsandminerals on the Bridge of SighsBismuth 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. 55". While bismuth's practical uses are limited beyond some pharmaceuticals, the element's utterly unique colors and shape continue to
