Brooke Goedert, April 5, 2021

The Winter issue covers an array of insightful topics, including treatment detection, geographic origin separation, and more.

Nanthaporn Nilpetploy, Kwanreun Lawanwong, Promlikit Kessrapong, Areeya Manustrong, and Nicholas Sturman, March 24, 2021

In this study, the Bangkok laboratory examined five low-quality bead cultured pearls sourced directly from a local pearl factory and characterized their features before and after processing.

Brooke Goedert, January 22, 2021

This issue features a unique glimpse into the overwhelming majority of diamonds submitted to GIA: those on the D-to-Z color scale.

Phoebe Shang, January 15, 2021

Recently, staff in GIA’s New York laboratory were astounded by two natural pearl finds on opposite coasts – one in Baja California, Mexico and one in Long Island, New York. Each find was outstanding and worthy of exploration.

Brooke Goedert, October 22, 2020

An overview of the Summer 2020 Gems & Gemology content.

Amanda J. Luke, September 18, 2020

Learn about how GIA is addressing industry concerns over undisclosed laboratory-grown and simulated fancy melee being mixed in with natural fancy melee.