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It is a relatively soft mineral
These pieces of cuboidal fluorite crystals in varying shades of dark green occur on a high contrast white-gray matrix
During the Eocene
Amber is the fossilized resinous tree sap from conifer trees
Fish Fossil - Knightia Eoceana Fluorite It is a relatively softDuring 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
