Trilobite necklace | sterling silver Trilobites owned the oceans for 270 million years. From the Cambrian explosion (~521 Ma) until the Permian extinction (252 Ma), these three-lobed arthropods diversified into 20,000 species and left fossils on every continent. Their compound eyes were calcite crystal lenses, the only biological mineral optics known. The Anatomy of the Trilobite Trilobites were marine arthropods with three distinct body lobes: a central axial lobe flanked by two pleural lobes (hence the name). The calcite exoskeleton was moulted as animals grew, creating an abundant fossil record across all Palæozoic strata. Trilobite eyes used calcite crystals arranged as doublet lenses in some species, achieving sophisticated underwater optics. This represents the oldest known biological mineral lens system. Over 20,000 species are described, making trilobites one of the most diverse animal groups in the fossil record. They dominated from the Cambrian through to the end-Permian mass extinction, when 96 percent of ocean species vanished in 50,000 years. A Quiet Symbol For palæontologists and evolutionary biologists specialising in deep time fossil collectors and natural history enthusiasts geologists studying Palæozoic fauna and extinction events anyone drawn to the Cambrian explosion and arthropod evolution Explore Related Fossil Jewelry Ammonite necklace | gold vermeil Scarab beetle necklace | gold vermeil Cat skull necklace | silver Dog skull necklace | silver FAQ Who wears trilobite jewelry? Palæontologists, evolutionary biologists, fossil collectors, and anyone drawn to deep time and early animal diversity. Trilobites are the gateway to Palæozoic life. A fossil scientist recognises this immediately. Why are trilobite eyes so significant? Because they were the first compound eyes known from the fossil record, and some species evolved doublet lens systems using calcite crystals. This was the only known biological mineral optics for 300 million years. The fact that trilobites could see underwater at all was a landmark evolutionary achievement, and the chemistry of their lenses remains a study model for understanding optical engineering in biology. What size, material, and chain? 30 mm pendant in 925 polished sterling silver, nickel-free and hypoallergenic. 45 cm sterling silver chain with 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days. Comes in a ready-to-gift eco-friendly box with the 30-day “Love It or Return It” policy. Does this appeal to geologists working with Palæozoic rocks? Yes. Trilobites are index fossils. Their presence in rock layers identifies Palæozoic age and biostratigraphy. For anyone studying Palæozoic geology, extinction events, or evolutionary history, the trilobite is a primary reference point.
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