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Pendant Description Fossil Trilobite Biwa pearl Sterling Silver Pendant SubCategory: Pendant Gift from Kimlud Jewelry Collection Material: Genuine Sterling Silver (.925 silver) Stone(s): 1 2 pieces top grade authentic fossil trilobite 1 piece authentic Biwa Pearl Overall dimension: 3.4 x .9 x 0.3 inches Inner bail diameter: 6 mm Weight: 15.2 grams Stamp: Fine Sterling Silver
Fossil Trilobites What are Trilobites? Trilobites are perhaps the most famous and easily recognized fossil invertebrate group. The name comes from the length wise division of the body into three lobes—two side (pleural) lobes separated by one central (axial) lobe. All trilobites had antennae and legs with two branches, one used for locomotion and the other for respiration. Some had compound eyes, like a modern fly. Trilobites were strictly marine animals, but they were very diverse, living in both shallow and deep waters. Their First known fossil occurrence is in Cambrian era. Their Last known fossil occurrence is in Permian era. Trilobites flourished in the oceans of the Cambrian and Ordovician periods, beginning around 540 million years ago, with a diminishing number of families persisting until the Permian. The number of families peaked in the Late Cambrian when an extinction event removed many. The morphological diversity actually peaked in the Ordovician. Many more families were removed at the end of the Ordovician 440 million years ago during a great ice age where ice sheets advanced to the equator. The diminished number of trilobite families that survived to the Silurian radiated into new and exotic forms, and still more exotic spiny and pustulose forms in the Devonian. The Elrathia kingi trilobite fossils are found in the Wheeler Shale Formation in Western Utah, USA(Age: Cambrian - ca 505 million years ago).
Biwa Pearl Natural pearls are formed when an foreign object becomes trapped in the shell of an oyster or pearl and the animal surrounds the object with several mineral layers in order to protect its soft tissue. Most pearls sold today are farmed pearls, created by intentionally inserting small mother-of-pearl beads in the oyster's shell. The resulting pearls are harvested up to two years later. Pearls come in a range of pastel colors from cream to blue to pink
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