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This specimen is a fragment of a Gastornis eggshell from Provence
Despite popular depictions of poor depth perception
and in the "Fat Man" atomic bomb used over Nagasaki
It shows the beautiful banded patterns that is typical of agates from this region
The Pyroraptor
Bismuth Rainbow Crystal Staircase - 2.117" dimetrodonbig This specimen is a fragmentBismuth 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. 117". While bismuth's practical uses are limited beyond some pharmaceuticals, the element's utterly unique colors and shape continue to
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