Natural-Color Purple Diamonds from Siberia
Twelve natural-color purple diamond crystals from Siberia were studied using spectroscopic methods to better understand their color and its causes.
A History of Diamond Treatments
An Investigation of a Suite of Black Diamond Jewelry
Gem Characterization
Diamond Geology
New Technologies and Techniques
Diamond Identification
General Gemology and Jewelry
Quarterly Crystal: Molybdenite Phantoms in Quartz
Raman analysis identifies unusual inclusions in quartz.
Futurescape Forum
A recap of the Futurescape Forum panel from GIA’s 2018 International Gemological Symposium.
Diamond Geology
Cleavage System in Pink Diamond
A Fancy Intense purplish pink diamond with a network of planar cracks and strain-induced bodycolor reveals an aesthetic geometric pattern.
Diamond Identification
Gem Characterization
General Gemology and Jewelry
Gem Localities and Formation
Colored Stones and Pearls
In Memoriam: Alan Hodgkinson (1937–2024)
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