This section, from the Summer 1983 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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.

This article describes a new type of synthetic fire opal marketed as “Mexifire.”

At the AGTA show, lapidarist James Carpenter explains his use of sugar/heat treatment to enhance opal.

Pronounced cubic cavities, sometimes containing fluorite, are observed in a rare hyalite sample.

蛋白石因展现彩虹般颜色的独特光学效应而闻名于世，这种现象被称为游彩。 蛋白石有两大类：贵重和普通。 贵重蛋白石会有游彩现象，而普通蛋白石则没有。

Fire opal production at a family-owned mine in Mexico is explored at the 2014 GJX show in Tucson.

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

This section, from the Spring 1997 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.