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This Michigan greenstone has a nontypical pattern, with a pair of datolite inclusions. With a rectangular shape on the top and a half-moon shape on the bottom, this is a really unusual stone. Greenstones with other stone inclusions are rare, and this one with datolite is very unusual--You don't see many of these! This would make a distinctive piece of jewelry or addition to your rock collection. 4.0 grams