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https://www.etsy.com/market/isle_royale_greenstone
Isle Royale Greenstone Cabochon for jewelry making, Michigan Greenstone (Chlorastrolite), Michigan State Gem SnobAppealJewelry 5 out of 5 stars (13) $ 88.79 FREE shipping Add to Favorites Michigan Greenstone Great Turtle Pattern 10 mm Sterling Silver Necklace (Chlorastrolite) ...
https://www.snobappealjewelry.com/greenstone.php
Isle Royale Greenstone Chlorastrolite is a variety of Pumpellyte which sometimes fills vesicles (holes) in Keweenawan Basalts as well as basalts on Isle Royale. Collecting Greenstone in Isle Royale National Park is strictly prohibited, but this lovely chatoyant gemstone can still rarely be discovered on the beaches and mine dumps of the ...
https://www.snobappealjewelry.com/store/38-greenstone-pendants
Michigan Greenstone (chlorastrolite) is a gemstone found in the Keweenaw Peninsula and on the Isle Royale National Park islands. The official state gemstone of Michigan, it is normally small and well-suited for bead earrings. The turtle-back or alligator skin patterns of green are characteristics looked for. Sometimes other minerals can also be ...
https://www.etsy.com/market/isle_royale_jewelry
Isle Royale Greenstone Pendant with native copper inclusion - Chlorastrolite - Michigan State Gemstone Keweenaw. GemNorth. From shop GemNorth. 5 out of 5 stars. …
https://dayoopers.com/the.store?page=catrock81.html
MICHIGAN GREENSTONE JEWELRY AND CABS: Also known as Chlorastrolite or Isle Royale Greenstone, this is the Michigan State Gemstone! It is a variety of pumpellyite and is highly sought after for its "turtle back" pattern used in jewelry. They are rare and only found on Isle Royale and the tip of the Keweenaw Peninsula.
http://gemnorth.com/Greenstone.html
Isle Royale is a National Park, and so it is illegal to collect gemstones there. Its quite difficult to identify unpolished greenstone, and stones larger that a half inch are rarely found. The Smithsonian Museum is home to the largest gemstone quality greenstone that measures 1.5 inches by 3 inches.
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