CAL2508 Price: $420
CALCITE on Mercenaria permagna
Rucks’ Pit, near Fort Drum; Okeechobee County, Florida, USA
Large Cabinet (21.5 x 11.1 x 8.6 cm)
This is a nice specimen containing two adjacent golden calcite-filled Mercenaria permagna clams in dark gray micritic limestone matrix. The left-side clam in the first photo is missing the “bridge” of calcite over the top of the crystals, which is present in the right-side clam. This allows one to see the internal mineralization within the clam not easily viewed otherwise. The largest calcite crystals are over 2 cm long, and many of them are a transparent golden yellow color. The calcite is fluorescent blue-green under shortwave and longwave UV light (see photo), and even phosphoresces for a few seconds when the UV light is extinguished. These specimens are Plio–Pleistocene in age (1–2 million years old).
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