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.

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

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.

Review of Stoned: Jewelry, Obsession, and How Desire Shapes the World by Aja Raden

Review of Gems & Crystals: From One of the World’s Great Collections, by George E. Harlow and Anna S. Sofianides.

Review of Jewelry by Suzanne Belperron: My Style is My Signature by Patricia Corbett, Ward Landrigan, and Nico Landrigan.

A tanzanite displayed crystallographically aligned, vividly iridescent colors resulting from fine separations along the stone’s cleavage planes.

Microscopic examination of an emerald revealed a purple banded inclusion with the appearance and optic character of fluorite.

A screening service allows the lab to screen for synthetic material in diamond melee parcels.

Reports on an expedition to many known and new Tanzanian gem localities.

Analysis of attractive purple garnets from a new deposit in central Mozambique.

The first visual record of axinite inclusions in quartz published in the gemological literature.

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

Examination of pearls with a dominant purple hue, reportedly from the Spondylus calcifer mollusk.