Dramatic growth features are found on the surface of a titanite specimen from Russia.

Unusual doublets created from two different synthetics are revealed at the Carlsbad laboratory.

Describes the chemical, morphological, and microscopic properties of the first gem-quality synthetic emeralds ever produced, offering a historical perspective on their development.

Recounts an expedition to Mozambique’s important deposits of ruby, spinel, and tourmaline, which have yet to be fully explored.

An examination of jadeite decorated with smaller jadeite ornaments.

Provides a visual guide to the internal features of natural, synthetic, and treated emeralds.

Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.

The chemical composition and spectroscopic characteristics of 14 gold sheen sapphires are examined.

A turquoise bead is found to have an artificial pyrite and resin matrix.

A review of Illuminations, from Earth to Jewel, at the Museum of Mineralogy at the ParisTech School of Mines in France.

Examines Jaipur’s role as a colored stone cutting and jewelry manufacturing center, with profiles of 17 companies and their factory, trading, and retail operations.

ボルダーオパールの人気は、ますます高まっています。 オーストラリアのクイーンズランド州中央部では、十数か所以上からこの石が生産されています。 このユニークな宝石つついて詳しくGIAのフィールドジェモロジストと一緒に探りましょう。