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07634 Pink Cobaltoan Calcite Crystals on Matrix Bou Azzer Mine (South Morocco) Moroccan Trilobites Tenuipeltis Tenuipeltis One of the difficult features to find in dentition samples of Spinosaurus is present in this piece The Mohs scale of mineral hardness Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3)
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