Nephrite (Jade) Boulder from Big Sur, CA.
Notice the large metal collar at the base of this Jade boulder, which must weigh several hundred pounds
Natural History Museum in Balboa Park, San Diego Featuring "ALL THAT GLITTERS" - The Splendor & Science of Gems & Minerals.
Exhibition Highlights: http://www.sdnhm.org/archive/exhibits/allthatglitters/highlights.php
***Photos taken without flash through glass/plexiglass