CALITE - CaCO3 A very nice specimen of fossilized clam of (Mercenaria permagna) with honey colored dogtooth calcite inside the shell. Excellent Fluorescent. From the Nashua formation near Okeechobee, Florida in Rucks Pit at Fort Drum. Size is 4"wide x 2-1/2"deep x 1-3/4" thick. Item FCA995. Weight 0.43 lbs.