Sea Biscuit cut base Adularescence is the name of

Adularescence is the name of an optical effect

fossils found primarily in Russia

green or pink like our the piece pictured

The iridescence is caused by the unique crystal structure in the layers of aragonite that make up the shell and how it reflects light

Vasonite is typically green but also can be found as green

Sea Biscuit cut base Adularescence is the name ofA sea biscuit is a type of sand dollar that is an marine animal of the order Clypeastroida (class Echinoidea, phylum Echinodermata). They are close relatives of sea urchins and heart urchins. Sea biscuits are less flattened and more rounded than a sand dollar. You will receive the exact item pictured. Dimensions: 2. 25 L x 1. 75 W x 1 H inches Weight: 0. 14 pounds