PreviousNext RUC4449 - CALCITE in Mercenaria Permagna $330.00 Locality Rucks' Pit, near Fort Drum, Okeechobee County, Florida, USA Dimensions 122mm x 99mm x 77mm Transparent to translucent yellow trigonal calcite crystals to 2 cm completely fill the interior walls of this sparkling Mercenaria “clam geode”, in gray sparry limestone. Specimen sits up well for display. No damage.