Is it a Padparadscha, or not?
Is it a Padparadscha, or not?
GIA Observes Unusual Color Change in Sapphires During Color Stability Testing... and what is Tenebrescence?
Above - Image copyright GIA,...
An Unusual Pearl: Coated or Not?
Roskin Gem News ReportGary Roskin
Conch Pearl: Coated, or not?
Identification of pearl coatings can be a bit tricky, especially if the coating has been performed...
GIA Alumni: Continuing Education
Learn from GIA's best. Continuing education sponsored by the GIA Alumni Collective
Sithole opens a Gemmological laboratory and Lapidary Center in Afghanistan
Tap here to read the feature story in the Herald
https://www.herald.co.zw/sithole-opens-a-gemmological-laboratory-and-lapidary-center-in-afghanistan/
Danat launches smartphone app for pearl and gemstone examination results
November 29, 2022
BAHRAIN
Manama, Bahrain – The Bahrain Institute for Pearls and Gemstones (Danat) has launched a new mobile application that enables customers to view...
2022 CGA Gem Conference
2022 CGA Gem Conference, October 21-23 – Vancouver, BC
Over the next several weeks, the Roskin Gem News will feature the guest speakers who presented...
Ti Surface Diffusion: Just when you thought it was an easy identification
New research shows that the titanium surface diffusion treatment is being polished off the facets, but left inside cavities and fractures. Stone Group...
Marvel’s Reality Stones are real, spectacular rubies — and they’re on sale
Mozambique, transparent, no heat - LATimes.com - JEVON PHILLIPS, MULTIPLATFORM EDITOR -
Just as the Avengers did, a chosen few people can start collecting...
Why lasers are being used to write inside diamonds
BBCBen MorrisTechnology of Business editor
I am peering through a jeweller's eyeglass, looking for the BBC logo that has been inscribed inside a small diamond.
The...
Fluorescence that proves Natural
Stone Group LaboratoriesCara & Bear Williams
Findings from Stone Group Laboratories shows the blue/white fluorescence in diamond can only be natural in origin.
Many gemstones...
Jedi Spinels: a quest to the origin of the ultimate red spinels!
AIGS News - a Webinar with Vincent Pardieu
Vincent Pardieu is a Consultant Field Gemologist at “VP Consulting WLL”, a writer and a documentary producer....
Gems & Gemology, Summer Issue 2022
Diamonds from Guyana, Ekanite from Sri Lanka, a New Amber Source in Vietnam, and More...
GIA.eduDuncan Pay, Editor-in-Chief
Other features include:The Shape of EkaniteDiscusses the unusual...
