11-1/2" Utah Septarian Bookends Agate Bookends allowing calcite to form crystals

allowing calcite to form crystals throughout

The oldest blastoids lived about 425 million years ago

Some Megalodon teeth have been measured over 7" in length

From the Latin word "citrus / citron tree"

11-1/2" Utah Septarian Bookends Agate Bookends allowing calcite to form crystalsThese strange and handsome Geodes are from the Henry Mountains of Utah. Originally formed in an ancient sea floor some 50 70 million years ago, sediment collected around sea life as they decomposed, forming a concretion. Calcium carbonate from the shells of these creatures began to take a new form over time, creating calcite crystals and bands of aragonite. As the oceans receded, these mud balls hardened, shrinking and cracking in the sun. The gold