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Ruby (17)
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A face-up view of a cushion cut diamond with blue color.
Article
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.

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These rubies were determined to be glass filled, partly due to the use of the DiamondView.
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.

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Micro-Features of Ruby
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.

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Summer G&G 2015
Article
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.

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G-G Spring 2015
Article
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.

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Heat treatment of some pink sapphires
Article
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.

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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.

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Natural Rubies with Glass-Filled Cavities

Robert E. Kane, December 1, 1984

An examination and analysis of 15 natural rubies with glass-filled cavities.

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The Chanthaburi-Trat Gem Field, Thailand

Peter C. Keller, December 1, 1982

Thailand has become the world's major source of gem ruby.

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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.

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The internal structures of natural pearls from the marine mollusk Pinctada maxima are the subject of the lead article in this issue. The scattered loose pearls on the cover are from Paspaley’s natural pearl collection, which includes one discovered in the 1970s at the Eighty Mile Beach fishing grounds
G&G Spring 2021 Edition
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