Aaron C. Palke, Shane F. McClure, and Nathan R. Renfro, December 12, 2022

Unexpected behavior is observed in sapphires submitted to GIA for color stability testing.

Brooke Goedert, November 11, 2022

An overview of the Fall 2022 Gems & Gemology content.

James E. Shigley, November 3, 2022

Review of Pegmatites and Their Gem Minerals, by Michael Menzies and Jeffrey Scovil.

Brooke Goedert, August 23, 2022

An overview of the Summer 2022 Gems & Gemology content.

Brooke Goedert, May 13, 2022

An overview of the Spring 2022 Gems & Gemology content.

Paul Johnson, A’Dhi Lall, Madelyn Dragone, and Stephanie Persaud, May 3, 2022

Type IIb blue diamonds are extremely rare in nature.