News & Articles

A truck travel the circular roadways of the large mine.

US Consumer Confidence Remains Strong; Alluvial Diamond Tracking and Illegal Gold

Russell Shor, September 23, 2019

U.S. consumer confidence has kept the economy from sliding into a possible recession.

A large group of people outside on GIA’s Carlsbad, California campus.

Guardians of Trust: GIA’s Innovative Research, Instruments and Services

Russell Shor, September 20, 2019

GIA’s services, instruments address new treatments and laboratory-grown gems as they enter the market.

Known Non-Nacreous Non-Bead Cultured Pearls and Similar Unknown Pearls of Likely Cultured Origin from Pinctada maxima

Areeya Manustrong, Promlikit Kessrapong, Kwanreun Lawanwong, Nanthaporn Nilpetploy, and Artitaya Homkrajae, September 4, 2019

Non-nacreous non-bead cultured pearls from the Pinctada maxima mollusk are characterized and compared with pen pearls in order to aid in origin separation.

Natural Shell Blisters and Blister Pearls: What’s the Difference?

Kwanreun Lawanwong, Nanthaporn Nilpetploy, Areeya Manustrong, and Artitaya Homkrajae, August 26, 2019

GIA researchers explore the differences between whole, blister, and shell blister pearls in this study using 33 samples from Pinctada maxima mollusks recovered off Broome, Australia.