Bismuth Rainbow Crystal Staircase - SOLD 2.044" jellyfish where they fed on algae

where they fed on algae and sponges

7-27 in the 1966 Apollo Operations Handbook for the Command and Service Module

55" on the longest edge

This particular specimen is a stone chopper

This intriguing mineral concretion is known as a septarian nodule

Bismuth Rainbow Crystal Staircase - SOLD 2.044" jellyfish where they fed on algaeBismuth 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 2. 044". While bismuth's practical uses are limited beyond some pharmaceuticals, the element's utterly unique colors and shape continue to