Article Search Results

Show Filters
Showing 14 results for "*"
Assortment of Linde synthetic star rubies and sapphires
Dual-Color Double Stars in Ruby, Sapphire, and Quartz: Cause and Historical Account

Examines a form of asterism comprising two six-rayed stars, one white and one that exhibits the stone’s bodycolor. Firsthand accounts and a survey of patent documents reveal that diffusion has been used to create or enhance this optical phenomenon in synthetic and possibly natural corundum since the 1950s.

Read More

Gem Mountain mining site
Article
Update on Rock Creek Sapphire Deposit

An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.

Read More

Confusing, Triangular Inclusions in an Art Deco-Style Pin
Spring 1991 G&G Lab Notes

This section, from the Spring 1991 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

Read More

A Preliminary Report on the New Lechleitner Synthetic Ruby and Synthetic Blue Sapphire

A new synthetic ruby and synthetic blue sapphire have been synthesized by Johann Lechleitner of Innsbruck, Austria.

Read More

The Gemological Properties of Chatham Flux-Grown Synthetic Orange Sapphire and Synthetic Blue Sapphire

The author examines the gemological properties of Chatham flux-grown synthetic orange sapphires and blue sapphires.

Read More

Abstracts; Winter 1991

This article, from the Winter 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Read More

Abstracts; Fall 1991

This article, from the Fall 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Read More

Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Fall 2009

This article, from the Fall 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Read More

Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Summer 2009

This article, from the Summer 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Read More

Article
Sapphire Series Part 4: Gem Synthetic Sapphire and Diffusion-Treated Synthetics

From the series, "Sapphire: A Crystal With Many Facets," this article explores how an increase in synthetic sapphire technical applications has affected the synthetic gem industry.

Read More