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This unique fossil ring features genuine petrified dinosaur bone sourced from the Morrison Formation in Utah. Fossils from this location date back to the Late Jurassic period, roughly 148-155 million years ago. It's set in quality sterling silver with 14-karat yellow gold accents along the sides for a sophisticated two-tone look. We've made every effort to accurately represent each of the materials on this webpage. The color of dinosaur bone can vary due to the natural agatized mineral and bone