Calcite in Mercenaria Permagna from Ruck's Pit Quarry, Fort Drum, Okeechobee County, Florida USA

This fascinating specimen formed when gemmy calcite crystals grew in the natural pocket formed by a buried fossil clamshell. The interior of the shell is now completely covered with transparent golden calcite crystals. The calcite crystals are scalenohedral form, and are cupped perfectly by the shell. 

You will receive the exact item in these photos 

Weight: 189.1 grams, Dimensions: 4 x 2 x 2 inches