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UV-reactive calcite
This impressive cutbase specimen features two large creamy calcite crystals perched on a sparkling bed of deep purple amethyst
a vast inland sea that covered much of North America
sculptural look and comes displayed on the custom metal stand shown
A gorgeous polished-edge amethyst piece covered in deep purple
Iridescent-Pearly Eutrephoceras with Marine Shell Fossil- Pierre Shale Montana | River Walkers Minerals Display UV-reactive calciteLocale: Pierre Shale Formation, Glendive, Montana, USA Age: Late Cretaceous (~7080 million years old) Dimensions: 371g 3. 7 x 2. 7 x 2 inches This attractive fossil association from the Pierre Shale of eastern Montana features a beautifully preserved Eutrephoceras dekayi accompanied by an associated marine shell fossil preserved in natural matrix. Both fossils display subtle iridescence with flashes of blue, green, pink, and gold that become
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