Research Article Search Results

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

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.

A discussion of the current demand for tsavorite and spinel in today’s market.

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

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

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

Melee diamonds can be efficiently screened for synthesis and treatment using infrared absorption spectroscopy, DiamondView imaging, and microscopy.

Describes the extremely rare polished pink diamonds from Australia’s Argyle mine that have been sold for 30 years through invitation-only tenders.

Review of Yvonne J. Markowitz and Denise Doxey's Jewels of Ancient Nubia.

Although this stone bore some superficial resemblance to moissanite, its gemological properties were consistent with HPHT synthetic diamond.

A look at the first CVD synthetic diamond examined at GIA that has been irradiated to a blue color.