Glendonite in Sandstone Concretion - Calcite Pseudomorph After Ikaite

An unusual stone consisting of a star-shaped pseudomorph within a sandstone concretion nodule. This is Glendonite - a type of calcite pseudomorph potentially after ikaite, though it is not entirely certain. This specimen came from from the Tersky coast of the Kola Peninsula, near the White Sea, Russia.

4.9cm