Observations of Oval-, Pear-, and Marquise-Shaped Diamonds: Implications for Fancy Cut Grading
Presents findings from observations of oval-, pear-, and marquise-shaped diamonds, laying the groundwork for a fancy cut grading system.
Classification of Gem Materials Using Machine Learning
Explores the application of several machine learning models to complement traditional gem classification approaches.
Generative Artificial Intelligence as a Tool for Jewelry Design
Evaluates the use of generative AI programs in jewelry design and addresses the related ethical, legal, and regulatory challenges.
Amethyst from Newfoundland, Canada: Geology, Internal Features, and Fluid Inclusion Microthermometry
Characterizes gem-quality amethyst from the La Manche deposit in the Avalon Zone of Newfoundland, Canada.
Two Imitation Melo Pearls
GIA’s Hong Kong and Bangkok laboratories report on imitation pearls with a striking resemblance to natural Melo pearls.
“Cotton Pearl” Imitations
An in-depth look at a new pearl simulant gaining popularity in the fashion jewelry market.
Gemfields Emerald and Ruby Auctions
Arzakite Inclusion in Ruby from Mogok
Almandine Garnet from Phu Tho, Vietnam
Reports on the study of garnet samples from a source in northern Vietnam.
Gems & Gemology at Ninety: A Look to the Future
The Extraordinary Backstory of Natural Diamonds: A Diamond Is (and Has Been) Forever
Interesting Metallic Platelets in Morganite
Fireworks Display in Russian Emerald
The inclusion scene in a Russian emerald resembles fireworks illuminating a night sky.
Zoned Trapiche Emerald with Goshenite Overgrowth
“Out of the Darkness” …and Into the Light of Diamond Fluorescence
New Production of Sapphire from Matepwende, Tanzania
Irradiated HPHT-Grown Diamonds with Blue-Green Color Zonation
Green Haüyne
Colored Bands in CVD-Grown Diamond
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