Research Article Search Results

Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.

Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.

A rare Tasmanian trapiche-type sapphire, found during a field expedition, is examined.

Explores statistical data and defining characteristics of gem-quality CVD synthetic diamonds examined by GIA since 2003.

Analyzes the gemological and geochemical characteristics of peridot from the Gia Lai province alongside specimens from other localities to gain insight into its formation.

Determines whether blue zircon, inadvertently altered to brown by exposure to long-wave UV radiation, can be restored to its original color through the use of incandescent light.

Reports on exceptionally rare trapiche-patterned rhodochrosite from the famed Capillitas mine in Argentina.

Documents the retrieval and testing of P. maxima cultured pearls from a Lombok hatchery.

Reviews the properties of exceptionally pure grandidierite from a new source.

Studies the formation and chemical composition of the largely unexamined alluvial sapphires from Russia’s Jewish Autonomous District.

Examines the challenges of ethical sourcing and production of colored stones, and what some industry leaders are doing to address the situation.

Chronicles the famed emerald source through the adventures of Peter W. Rainier, who directed the mine from 1926 to 1931 and restored its former glory.