Identifies mineral inclusions in corundum from this locality for comparison with other global deposits.

A look at the gem ornamentation of this landmark, as well as the jewels of the Mughal dynasty.

Spectroscopic and chemical analyses of emeralds from this Chinese deposit show a unique composition.

Determines methods for maximizing production and quality of cultured half-pearls.

Examines a new rhodochrosite simulant composed of pressed gibbsite and calcite powder.

Characterization of an intense yellowish green faceted diamond revealed a complex treatment process.

Reveals the process for hydrothermal enhancement of amber and the means of detection.

A systematic study of the properties of approximately 500 Fancy white and 1,200 Fancy black diamonds.

Resin materials marketed as imitation ivory were recently acquired by a GIA gemologist.

The Hong Kong laboratory recently examined a 14.36 ct pink-orange cushion mixed-cut specimen.

Artificial glass, a low-cost material, is capable of simulating any gemstone owing to its range of appearances (bodycolor, transparency, and phenomena).

Recently, a 2.05 ct blue sapphire was sent to Guild Gem Laboratories for identification.

An eye-visible cloud with a star-like pattern is highlighted by the cut of the Rare Sun diamond.

A remarkable inclusion scene in diamond is showcased by an unconventional cutting style.

The New York lab recently identified a sapphire entirely covered with a cobalt coating to enhance its blue color.

The 2019 AGTA show in Tucson featured the work of a gemstone portrait artist.

Minute platy magnetite inclusions in these emeralds from Pakistan could help advance our understanding of trapiche.

Quartz crystals with three-phase fluid inclusions from the Jinkouhe mine in the Sichuan Province of China have been sold for many years at gem and mineral shows such as those held annually in Tucson, Arizona.