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

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.

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

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

Examination of aquamarine samples from a new primary deposit in San Luis Potosí, northern Mexico.

A strikingly large primary fluid inclusion with a gas bubble was seen in a Moroccan amethyst.

Reports on the internal features and spectroscopic and trace-element analysis of rubies reportedly from Pokot, Kenya.

Testing of natural-color yellow sapphires from Australia and Thailand with the FTIR features of “Punsiri” heat-treated material.

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

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

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

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

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

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

A spinel from Madagascar, mixed in with a parcel of blue sapphire, exhibited an array of internal features.

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

This violet-colored fluorite crystal was free to move in its octahedral void, as seen in four different positions. Photomicrographs by Nathan Renfro; field of view 7.18 mm.

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