Miocene Epoch, 23-5.3 million years BP. A split pair of agatized coral, the exterior of the specimen showing the shape and structure of the coral, the inside of the specimen filled with botryoidal chalcedony or agate. 765 grams total, 19-20cm (7 1/2 - 8"). From an old Lincoln, UK, collection; from Coral Deposits Formation, Tampa Bay, Florida, USA. [2, No Reserve]