macro texture septarian crystal formations |
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| navigate by keyword : air aragonite black bubbles calcite coated composed cream crystal formations formed fossilized gem geological geology gray grey jewel limestone macro million mud nodules pockets septarian texture white years yellow |
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| Septarian Nodules are fossilized mud bubbles that formed between 50 and 70 million years ago. They are composed of calcite, aragonite, and are coated in limestone. Septarian Nodules form in air bubbles which create crystal pockets. |
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