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Isle Royale Greenstone Cabochon .6 grams
Gs774
New
Light sage green and chatoyant, this is an excellent Isle Royale Greenstone for jewelry.
.6 grams
Approximately 11mm round dome 4mm
1 Item
Unique Item
More info
This is a sweetheart of a gemstone, and value priced. If this is the size you want, get it.
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.
