Jeffery Bergman has been privileged to supply exceptional natural gemstones to prestigious names such as Cartier, Graff, Van Cleef & Arpels, Chow Tai Fook, Lao Feng Xiang, Kat Florence, Ivy New York, Jeffrey Bilgore, Crevoshay, Somewhere In The Rainbow Collection, two AGTA Spectrum Award winners, Milan Natural History Museum, American Museum of Natural History, Smithsonian National Museum of Natural History, Harvard University Mineralogical & Geological Museum, Natural History Museum of Los Angeles County, Alfie Norville Gem & Mineral Museum, The Royal Ontario Museum, University of Arizona Gem Science Department, and many others.