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This greenstone is a generous size, almost 15 mm around, and is offered here at a bargain price. This is way larger than most people have!
The Michigan greenstone, also known as chlorastrolite, was selected as the state gem of Michigan in 1973. This rare mineral is found only on small select areas of the Keweenaw Peninsula or on Isle Royale National Park.
The Michigan greenstone, also known as chlorastrolite, was selected as the state gem of Michigan in 1973. This rare mineral is found only on small select areas of the Keweenaw Peninsula or on Isle Royale National Park.