Research Article Search Results
New Production of Sapphire from Matepwende, Tanzania
A Multicore Non-Bead Cultured Pearl
Fireworks Display in Russian Emerald
The inclusion scene in a Russian emerald resembles fireworks illuminating a night sky.
Zoned Trapiche Emerald with Goshenite Overgrowth
Colored Bands in CVD-Grown Diamond
Arzakite Inclusion in Ruby from Mogok
Classification of Gem Materials Using Machine Learning
Explores the application of several machine learning models to complement traditional gem classification approaches.
Splendors from the Deep: Historic Treasures from a Spanish Shipwreck
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.
The Extraordinary Backstory of Natural Diamonds: A Diamond Is (and Has Been) Forever
“Cotton Pearl” Imitations
An in-depth look at a new pearl simulant gaining popularity in the fashion jewelry market.
Two Imitation Melo Pearls
GIA’s Hong Kong and Bangkok laboratories report on imitation pearls with a striking resemblance to natural Melo pearls.
