Article Search Results

Show Filters
Showing 145 results for "*"
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; Winter 2009

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

Read More

Titanium-coated tanzanite
Titanium-Coated Tanzanite

For the first time, GIA's laboratory has examined tanzanite color-coated with titanium.

Read More

Milky white opals
UV-Reactive Opal

The first documented UV-reactive chemical treatment to make opal appear tenebrescent.

Read More

Glass-filled yellow sapphire
Yellow Sapphire Filled with Lead Glass

Lead-glass-filled orangy yellow sapphire undergoes laboratory observation.

Read More

Scapolite fragments exposed to UV radiation
Tenebrescent Irradiated Scapolite

The effect of irradiation on scapolite with tenebrescence, a color-change phenomenon that occurs after exposure to UV light.

Read More

Bangle of polymer-impregnated aventurine quartz
Polymer-Impregnated Aventurine Quartz, a New Imitation of “Ice Jade”

A bangle, thought to be jadeite jade, is revealed by laboratory testing to be polymer-impregnated aventurine quartz.

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
Titanium-Coated Tanzanite

For the first time, GIA's laboratory has examined tanzanite color-coated with titanium.

Read More

Green Sapphire Filled with Glass

Analysis reveals blue lead glass filling in a sapphire that has an overall green bodycolor as a result of the filling’s combination with natural yellow color.

Read More