Turquoise
Searchlight Mining District, Clark County, Nevada, USA
8.0 x 3.0 x 2.0 cm. Amazingly, the mineral turquoise has totally pseudomorphed an animal bone, turning it a light green color. On rare occasions animals and humans die in the vicinity of ore bodies, primarily copper, and their skeletons are replaced cell by cell by the minerals. A bone replacement is essentially a pseudomorph similar to turquoise ...
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