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Some species grew to enormous sizes
likely feeding on jellyfish and other soft-bodied marine organisms
likely triggered by a combination of catastrophic factors such as asteroid impact
Remains of partial Poebrotherium carcasses have been found fossilized
though it can also occur in massive forms
2.5" Natural Rough Black Tourmaline Mineral Crystal Specimen Schorl Brazil Seed Some species grew to enormousLocation: Brazil Weight: 3. 7 Ounces Dimensions: 2. 5 Inches Long, 1. 4 Inches Wide, 1. 2 Inches Thick The item pictured is the one you will receive. Black Tourmaline, also known as Schorl, is a striking black crystal from the tourmaline family, valued for its deep color, durability, and natural luster. Found in igneous and metamorphic rocks, Black Tourmaline forms long, striated crystals with a glassy to resinous surface. With a Mohs hardness of 7 to
