AuctionsNov 13, 2026
Historic ‘Romanov Sapphire’ Achieves $4.9M at Sotheby’sThe 197-carat Russian Crown jewel was the leading lot of Sotheby's white-glove Royal & Noble Jewels sale this week.
My Next Question Webinar
Natural Diamonds: A Great (but Often Untold) Geology StoryRegister
WEDNESDAY, JUL 31, 2024 2:00 PM (EASTERN)
Sponsored by
Natural diamonds are rare minerals and exceptional gemstones. They formed millions of years ago deep in the earth under conditions which created a unique geological “signature” in their atomic structure and crystal morphology. This natural signature, which can be detected using scientific instrumentation. is important because it cannot be created in laboratory-grown diamonds which form very quickly by methods which do not exist within the earth.
This presentation will summarize aspects of the geological history and mining of diamonds that will hopefully provide jewelers with ideas to share with customers considering a natural diamond purchase.
This presentation will summarize aspects of the geological history and mining of diamonds that will hopefully provide jewelers with ideas to share with customers considering a natural diamond purchase.
Webinar Guests
John Cason Manager, On-Campus Instruction • Resident Gemology, Gemological Institute of America
James Shigley Distinguished Research Fellow, Gemological Institute of America
Webinar Host
Gemological Institute of America, GIA Nonprofit Institute, protects the gem and jewelry buying community.
GIA - Protecting consumers and supporting the global gem and jewelry trade since 1931 through research, education, and laboratory services.The Latest
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