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Greenstone Cabochons

Chlorastrolite was declared Michigan's State Gem, but it is only found in a small portion of the state, the far north.  It comes from Isle Royale (now a National Park where collecting is prohibited) and from certain copper areas of the Keweenaw Peninsula which juts out into Lake Superior.  Created by volcanic action the host rock is mineral rich...

Chlorastrolite was declared Michigan's State Gem, but it is only found in a small portion of the state, the far north.  It comes from Isle Royale (now a National Park where collecting is prohibited) and from certain copper areas of the Keweenaw Peninsula which juts out into Lake Superior.  Created by volcanic action the host rock is mineral rich and was first valued for the copper found there.  While finding copper, miners also found these small nodules of green, and sometimes they would polish into gemstone beauties.  These are the treasures we crave, starry, well-patterned with geometric, chatoyant variations of dark and light green, and sometimes some pink Thomsonite or other inclusions. Greenstones have become quite scarce because old mine rock piles are being crushed and used for gravel.  When you buy a Greenstone, you are investing in a rare gemstone. Our stones are well polished and ready for use in rings or other jewelry.

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