34th International Gemmological Conference
A report from the 34th IGC, held in Vilnius, Lithuania in August 2015.
Demantoid Garnet with Giant Fluid Inclusion
A large fluid inclusion within a demantoid garnet from Madagascar provides insight into the source’s mineralization.
Grandidierite from Madagascar
An unfamiliar rough fragment acquired from Madagascar may point toward a new source of grandidierite.
A New Natural-Color Bluish Green Chalcedony
A new type of African chalcedony with the trade name “Aquaprase” shows unique composition and attractive color.
Rubies from a New Deposit in Zahamena National Park, Madagascar (英語)
A field expedition from GIA Bangkok explores a new ruby deposit and collects specimens for study.
First International Emerald Symposium
A report from the First International Emerald Symposium, held in Bogotá in October 2015.
GSA 2015 Annual Meeting
A report summarizing the annual meeting of the Geological Society of America in Baltimore.
Golden Coral Imitated by Plastic
Mexican Demantoid from New Deposits
Skarn deposits in the Veracruz state of Mexico yield new demantoid material.