Nominal Type IaB Diamond with Detectable Uncompensated Boron
Examination of a type IaB diamond that exhibited instantaneous 2803 cm–1 FTIR absorption shortly after exposure to an ultra-short-wave UV source.
Microscopic Observations of Blue Sapphires Treated with Heat and Pressure
In recent months, sapphires treated under heat and pressure have been documented in the trade.
Single HPHT Synthetic Diamond Mixed in Natural Diamond Ring
Single HPHT laboratory-grown diamond identified in a ring containing 194 natural diamonds.
Synthetic Moissanite Coated with Diamond Film Imitating Rough Diamond
A rough sample submitted as diamond is proven to be a synthetic moissanite with a thin diamond coating.
Chicago Responsible Jewelry Conference (英語)
Held October 21 and 22 at Cinema Row, the Chicago Responsible Jewelry Conference drew 200 attendees who heard industry experts discuss safe, sustainable, ethical gem production and jewelry design.
Coated Pink Synthetic Moissanite
A pink synthetic moissanite is coated with a thin colored film, raising questions about the natural origin of its color.
Second World Emerald Symposium
Important topics such as sustainability, blockchain, nanotechnology, and traceability were discussed at the second World Emerald Symposium held in Bogotá.
Emeralds Filled with Epoxy Resin: DiamondView Observations
“Blue flashes” seen with the DiamondView help to analyze the quantity and variety of emerald-filling substances.
GSA 2018 Report
Presenters reported on a broad range of research topics at the annual meeting of the Geological Society of America in Indianapolis.
Crowningshieldite: A New Mineral
A newly discovered mineral, crowningshieldite, was accepted on September 18, 2018, by the International Mineralogical Association.
Meeting of the International Mineralogical Association
Researchers gathered at the 22nd meeting of the International Mineralogical Association (IMA) to discuss several colored stone topics ranging from treatments to the latest advancements in understanding gem minerals.
Guizhou Jade from Qinglong, China
The authors collect Guizhou Jade at the mine and explore the antimony deposit in Qinglong, China.
Natural Emerald with Inclusions Along Three Directions
Guild Gem Laboratories examines a 10.48 ct sugarloaf emerald for identification and origin determination.