Characterization of “Orange Peel” Surface Microstructure of White Nephrite from Russia: A Unique Pseudomorph Pattern
Examines correlations between surface microstructures and the orange peel effect in Russian white nephrite, proposing a formation model and revealing distinctive microfeatures specific to the material.
Sea Urchin–Like 3D Radial Fissures in a Heated Mong Hsu Ruby
Examination of a 1.34 ct ruby reveals a unique inclusion formed during heat treatment.
Quarterly Crystal: Almandine-Pyrope Garnet in Diamond
A diamond octahedron from South Africa hosts a rare yellow-orange almandine-pyrope garnet crystal.
Suspended Pargasite Crystal in Pink Spinel
A euhedral prismatic pargasite crystal is identified in pink spinel.
Natural Opal with Unusual Play-of-Color Pattern
Play-of-color pattern in Ethiopian opal is reminiscent of a turtle’s shell.
Extraordinary Large Bicolor Natural Rough Diamond
A 37.41 ct natural rough diamond with distinct pink and colorless zones is examined at GIA’s Botswana laboratory.
How GIA Analyzes Pearls from Start to Finish
How GIA Analyzes Colored Stones from Start to Finish
Imitation Seed Pearl with Blue X-Ray Fluorescence
The Science of Phenomenal Gems, a Summary of Pegmatites, and a Cutter’s Remarkable Journey
HPHT-Processed Natural and Laboratory-Grown Diamonds with Counterfeit Inscriptions
Emeralds and Beryl from Kazakhstan and Ukraine
“Sugar Plum” in Titanium-Diffused Blue Sapphire
Pezzottaite with Multiple Cat’s-Eyes
Well-Formed Rutile Star in Quartz
Quarterly Crystal: Unique Phantom in Diamond
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