The techniques for cutting and polishing gemstone giants.

Mining fine cat's-eye chrysoberyl and alexandrite in Brazil.

This is the second part in a three-part series on the origin of color in gem materials.

The authors determined that there are actually seven types of

This article reviews the history of the conch "pearl," discusses S. gigas and its fisheries, and examines the gemological properties and other characteristics of this attractive material.

Examination of a group of 14 brownish yellow, yellow, and greenish yellow synthetic diamonds reveals distinctive gemological properties.

This three-part series of articles reviews our current understanding of gemstone coloration.

An examination of the two types of sugilite found at the Wessels mine in South Africa.

A treatise on the design, display, care and repair of fine gemstones.

A study of iridescent orthoamphiboles marketed as Nuummite.

A review of mid-20th century jewelry styles.

The techniques of this precision inlay style are explained.

This article discusses the origins of Art Nouveau and outlines the distinctive interpretations and contributions made by significant Art Nouveau jewelers.

Sumitomo Electric Industries is producing gem-quality synthetic yellow diamonds in deep yellow single crystals in sizes up to 2 ct.

This section, from the Fall 1986 issue of Gems & Gemology, is a compilation of interesting finds from GIA's laboratories.

An important clue in identifying natural-colored corundum is the presence of carbon dioxide fluid inclusions.

Where there are no inclusions or color zoning, the presence of Brazil twinning in the natural amethyst will usually make the distinction.

This section, from the Summer 1986 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

Several famous and historical gemstones in the Smithsonian's collection are examined and reported on.

The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.