Research Article Search Results
Patchy Yellow Trigon
Isolated nitrogen confined to the outer surface of a 0.98 ct diamond causes “yellow skin.”
Night Sky in Yellow Sapphire
Fiber-optic light creates a night sky scene in a yellow sapphire from Madagascar.
“Atypical Beads”: Variations of Two Types of Nuclei
Four atypical bead cultured pearls with variations on two types of nuclei are examined in the Mumbai laboratory.
Ruby with Interesting Synthetic Overgrowth
Microscopic examination of a ruby at the Carlsbad laboratory reveals synthetic overgrowth indicative of high-temperature heat treatment.
Zeki Karaca Jewelry: Luxury Pens
Liberian Ruby
A trip to a rural Liberian diamond mining community results in a newly discovered source of corundum.
Brenda Smith Jewelry Designs
Sixth Annual Gianmaria Buccellati Foundation Award Winner
A graduate of GIA’s Jewelry Design program in London is the recipient of the 2022 Gianmaria Buccellati Foundation Award.
Exceptionally Rare Pearls from ECIJA
Gemological Characterization of Montana Sapphire from the Secondary Deposits at Rock Creek, Missouri River, and Dry Cottonwood Creek
Examines the mining history and geological characteristics of the three secondary sapphire deposits in the state of Montana, as well as the properties of these sapphires (unheated and heat-treated).
Plastic Deformation: How and Why Are Most Diamonds Slightly Distorted?
Microscopic Shells in Natural Pearls from Pinctada radiata
Two pearls from Bahrain containing minute shells are examined at GIA’s Mumbai laboratory.
