Gems & Gemology’s 7 Most Unusual Encounters from 2019
Stuart Overlin, Brooke Goedert and Kellie Giordano, December 13, 2019
Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
Separating Glass-Filled Rubies Using the DiamondView
Larry Tai-An Lai, August 9, 2018
The DiamondView instrument is able to identify glass as the filler in a pair of heart-shaped rubies.
Inclusions in Natural, Synthetic and Treated Ruby
Nathan D. Renfro, John I. Koivula, Jonathan Muyal, Shane F. McClure, Kevin Schumacher, and James E. Shigley, January 26, 2018
Provides a visual guide to the internal features of natural, synthetic and treated rubies.
Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section
Russell Shor, August 14, 2015
G&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.
Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics
Russell Shor, June 12, 2015
G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.
Low-Temperature Heat Treatment of Mozambique Ruby
Vincent Pardieu, Sudarat Saeseaw, Stanislas Detroyat, Victoria Raynaud, Supharat Sangsawong, Thitima Bhusrisom, Sasithorn Engniwat and Jonathan Muyal, April 28, 2015
Report on changes in Mozambique ruby following low-temperature heating, observed using inclusion analysis, FTIR spectroscopy and LA-ICP-MS.
Beryllium Diffusion of Ruby and Sapphire
John L. Emmett, et al., June 1, 2003
The heat treatment of corundum involving lattice diffusion of beryllium (Be) at temperatures over 1800°C has become a major issue in the gem trade.
Natural Rubies with Glass-Filled Cavities
Robert E. Kane, December 1, 1984
An examination and analysis of 15 natural rubies with glass-filled cavities.
The Chanthaburi-Trat Gem Field, Thailand
Peter C. Keller, December 1, 1982
Thailand has become the world's major source of gem ruby.
Heat Treating Corundum: The Bangkok Operation
Jack S. D. Abraham, June 1, 1982
An overview of the potential effects that heat treatment can have on corundum.