Rublellite tourmaline
39-carat rubellite tourmaline set in gold necklace in the Hall of Gems of the Field Museum of Natural History at 1400 S Lake Shore Drive in Chicago, Illinois on April 10, 2014.
NIKON CORPORATION NIKON D800, f/16 @ 105 mm, 0.5s, ISO 100, No Flash
2014 Glenn Nagel
