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Product Description
Agatized Coral Unpolished
This is a geode half, sliced but unpolished, of Agatized Coral and it is 4.85 inches by 2 inches at its widest and 17 mm or .66 of an inch thick.
This is agatized fossil coral from Tampa Bay, Florida.
Florida agatized corals are the skeletal remains of colonial animals, known as anthozoans, that died 25 to 38 million years ago (Miocene).
It was formed when fine sediments covered shallow coral reefs. As silica rich groundwater ran through the rock that was formed (and exposed as sea-levels dropped), it replaced the calcium carbonate skeleton of the coral with Chalcedony.
For many years since its discovery, Tampa Bay coral was the best known and most widely field-collected of the Florida agatized corals. Collecting opportunities are now limited as most of the area has been developed.
In 1979, Florida agatized coral was designated by the Florida Legislature as the official state stone.
