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botryoidal quartz
It is found in many sites across the world
which over the course of millions of years becomes solid while retaining the semitransparent yellowish hue of tree sap
sometimes including growth rings
Fish Fossil - Knightia Eoceana Ruby botryoidal quartzDuring 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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