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Low-domed, a very chatoyant Michigan greenstone pattern is evident on this stone. It shows some black inclusions which add to the interest. This gemstone has a large surface area making it a striking focal stone for jewelry for a very reasonable price. It is a very nice Michigan state gem. The greenstone, also known as chlorastrolite, is the state gem of Michigan and is found only is small select areas of the Keweenaw Peninsula or on Isle Royale National Park. 1.1 grams