|
|
RARE LARGE BLUE AGATIZED CORAL GEODE WITH BOTRYOIDAL STRUCTURES Withlacoochee River - Florida, USA OLIGOCENE PERIOD : 38 million years ago Agatized fossil coral is highly prized by not only fossil collectors, but by gem and mineral collectors, as well. Large exquisite forms from Florida are especially in demand as the state produces some of the finest examples of this geological oddity in the entire world. This remarkable specimen is VERY rare and unlike most that are found with amorphic, crystalline or random globular structure, this large example has a botryoidal (globular) preservation of the scattered internal chambers of the original coral head. Of all typical agatized coral examples found ANYWHERE in the world, RARELY will you ever encounter agatized coral with structures as shown above. The specimen being offered here is a large fossil coral colony geode that is lined with RARE BLUE-WHITE gem-grade botryoidal (globular) chalcedony structures. Out of the truckloads of this material we have seen, seldom are any hollow geodes that have these structures but even more rare, on only very rare occasion does the cavity become completely blue-white like this unbelievable example! The complete inner surface has fossilized into a light bluish white chalcedony giving a "frozen" arctic effect to the entire inner chamber. The inside resembles a miniature ice cave lined with exquisite and rare formations of chalcedony that is translucent when held to light as seen above. The absence of ugly iron staining and discoloration in the inner surface is extremely rare! Incredible color, form and contrast to this amazing specimen of Nature's finest art! Agatized coral of this quality is so rare that usually it is cut up and used in very expensive custom jewelry pieces. As a complete crystal specimen, it is worth even more in its natural state. Absolutely NO ENHANCEMENT, NO DYEING, NO REPAIR and NO RESTORATION. Cavity is partially translucent and will glow if displayed in front of a light! Agate, also known as chalcedony, is a type of cryptocrystalline quartz (SiO2). Under unique geological conditions, prehistoric corals and mollusks can fossilize by being replaced with agate from silica-rich ground water percolating through limestone. The Florida Legislature designated agatized coral as the Florida State Stone in 1979. The statute describes it as “a chalcedony pseudomorph after coral, appearing as limestone geodes lined with botryoidal agate or quartz crystals and drusy quartz fingers, indigenous to Florida." Agatized coral occurs in a variety of colors, typically gray, brown, black, yellow, white, and on rare occasion red. The majority of Florida’s agatized coral formed in Oligocene-Miocene Hawthorn Group sediments. Fossil agatized coral is occasionally dredged up in the Tampa and Clearwater areas but also occurs in limestones along the Econfina, Withlachoochee and Suwannee Rivers. Fossil corals were simple marine invertebrates that possessed a sac-like body called a polyp with a mouth and tentacles. As carnivores, they would immobilize or kill their prey with their stinging tentacles then swallow their prey and later expel the wastes through the same mouth. They formed a dense outer skeleton of calcium carbonate which, when living in large colonies of thousands of cloned individuals, formed a massive structure. The complex folds in their stomach cavity can be seen in the wondrous detail left behind in their skeletons. Modern corals today share a symbiotic relationship with algae that covers their body tissue. The algae supplement the coral with oxygen which most likely was the case in prehistoric times, as well. Prehistoric corals are believed to have thrived in the same environments that modern corals prefer - clean, warm oceans of normal salinity levels. Solitary corals were present in oceans of soft, muddy bottoms while horn corals and colonial corals preferred hard sea floors to attach themselves. A RARE FOSSIL CORAL COLONY WITH BLUE-WHITE AGATIZED BOTRYOIDAL CAVITY OF GEM-GRADE CHALCEDONY! 9.25" wide x 5.5" high overall $695 COR-058 INCLUDES STAND Actual Item - One Only |
|
695 |
