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Aquamarine has a hexagonal crystal structure and is highly prismatic
many of which feature coatings of fine
The herring-like fish of the genus Knightia were far and away the most abundant freshwater fish during this era
Each of these cut and polished slabs originates from Indonesia and is approximately 20-23 million years old
Fish Fossil - Knightia Eoceana Shark Tooth Aquamarine has a hexagonal crystalDuring the Eocene, 40 50 million years ago, vast shoals of freshwater fish inhabited a large shallow inland sea across the American West. The herring like fish of the genus Knightia were far and away the most abundant freshwater fish during this era, and because of this they are one of the most frequently found vertebrate fossils on earth. Originating from the famed Green River Formation in Wyoming, fossils of Knightia eocaena and their close
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