An unfamiliar rough fragment acquired from Madagascar may point toward a new source of grandidierite.

A report from the 34th IGC, held in Vilnius, Lithuania in August 2015.

A new type of African chalcedony with the trade name “Aquaprase” shows unique composition and attractive color.

A large fluid inclusion within a demantoid garnet from Madagascar provides insight into the source’s mineralization.

A field expedition from GIA Bangkok explores a new ruby deposit and collects specimens for study.