Research Article Search Results

A rare mineral acquired along the Thai-Myanmar border exhibits the distinctive six-spoke pattern associated with trapiche.

Advancing CVD growth technologies yield intensely colored, high-quality synthetic diamonds, such as the two green-blue synthetic materials seen in the New York lab.

Proposes a model for trapiche emerald formation based on petrographic, spectroscopic, and chemical examination.

Examines a new source of colorless and near-colorless gem-quality HPHT synthetic diamonds using spectroscopic and gemological analysis.

The Bangkok lab examines near-colorless HPHT synthetic diamonds in melee sizes.

The New York lab examines three pink CVD synthetic diamonds which have received LPHT annealing treatment.

An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.

Offers geological context and gemological characterization of this increasingly popular vivid blue spinel from northeast Vietnam.

Unique carvings in gems are displayed at GJX in Tucson.

The New York lab discovers a synthetic melee diamond in a pendant, underscoring the importance of testing for undisclosed synthetics.

Examination of the largest HPHT synthetic diamonds GIA has examined so far demonstrated significant progress in this growth technology.

Explores the geology, production, and yield of the world’s most commercially important ruby deposit.