Diffusion-Induced Blue Spinel-Like Layer on Natural Sapphire
Gold-Plated Gold
Diamond Within a Diamond Within a Diamond
Iridescent Pen Shell
Letters: Nacken Synthetic Emeralds: Additional Information
Finds from the Secondary Market
Dave Bindra shows some noteworthy pieces he obtained on the secondary market and shares his thoughts on the state of the colored stones market.
Multi-Generation Cutting Family from Idar-Oberstein
The Cause of Iridescence in Rainbow Andradite from Nara, Japan
“Rainbow” andradite from Nara, Japan, occurs as relatively small orangy brown crystals that show attractive iridescence in almost the entire range of the spectrum.
Japanese Jadeite Tables
37th International Gemmological Conference
A report from the 37th IGC, held in late October 2023 in Tokyo.
Fall 2023 Auction Highlights
Large blue and pink diamonds were among the top lots of the fall auction season, including the most expensive auction jewel of 2023.
G&G Contributors Awarded for Best Geoscience Research
Yellow Mn-rich Tourmaline from the Canary Mining Area, Zambia
Oregon Sunstone Update
Preview of Nature Art Science with Paula Crevoshay
Tairus Hydrothermal Synthetic Sapphires Doped with Nickel and Chromium
New Fluorite Deposit in Nigeria
Gemstone Artisan Keycaps
Paraíba-Like Synthetic Sapphire
Two flame-fusion synthetic sapphires with a Paraíba-like color are examined at GIA’s Carlsbad lab.
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