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Michigan Greenstone Cabochon .9 grams
Gs762
New
A round cabochon of Michigan's State Gem Greenstone, with a very uniform alligator pattern across the whole surface. .9grams
Approximately 10mm x 11mm x .5mm
1 Item
Unique Item
More info
An excellent alligator pattern with uniform circles covers the whole surface of the stone. This is a beauty.
The Michigan State Gem is commonly called "Greenstone", "Michigan Greenstone" or "Isle Royal Greenstone". The correct mineral name is Chlorastrolite, a variety of pumpellyite. Chlorastrolite is found as small pebbles on the beaches of Isle Royale in Lake Superior and also throughout the Keweenaw Peninsula. Greenstone is associated with the native copper deposits of Northern Michigan. The Michigan Greenstones are found as green/black nodules in vesicles of the amygdaloidal basalts. Most greenstones are smaller than a pea, and really large ones are extremely rare.
