ORIGIN: Russia, Michaelov
PERIOD: Jurassic, Callovian 160 million years old
SIZE: Approx. 1-3/8" x 1-1/16" x 1/2"
This ammonite has been completely replaced by pyrite; it has been carefully sanded and polished on one side to expose the open chambers which are lined with hundreds of sparkly pyrite drusy crystals. This specimen has pyrite drusy in many colors, most noticably blue, but also a bit of green, dark purple, and bronzy dark gold colors. The back is partly covered with a slightly pinkish white nacre.
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Please note, all images are enlarged to show detail, please read description above for size.