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.

While a Geiger counter may show the existence of radioactivity, determination of the actual type of radionuclide and the quantity present requires a more sophisticated technique, gamma-ray spectroscopy.

Both crystal morphology and size can greatly affect the properties observed in a synthetic diamond.

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 Summer 1993 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

“The Professional's Guide to Jewelry Insurance Appraising”; “Metalwork in the Arts And Crafts Tradition”; “The Last Empire: De Beers, Diamonds, and the World”

This section, from the Summer 1994 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

This section, from the Summer 1995 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

“The Art of Jewelry Design, Volume I”; “Collectable Reads: A Universal Aesthetic”

idely known as a rock-forming mineral, andalusite is not frequently encountered as a gem material.

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 Fall 1989 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.