Colors K thru Z: Reading a GIA Diamond Grading Report
Colors K thru Z: Reading a GIA Diamond Grading Report
Gary RoskinRoskin Gem News Report
In looking through the Sotheby’s catalogue for November's Magnificent Jewels auction...
Magnificent Jewels Including the Bleu Royal
Magnificent Jewels Including the Bleu Royal
Gary RoskinRoskin Gem News Report
Christie’s Magnificent Jewels auction at the Four Seasons Hotel des Bergues in Geneva features a...
GIA Diving In: Adds ‘Hanadama’ Quality Range
Hanadama, the Grade for Top Quality Akoya Cultured Pearls
Gary Roskin - Roskin Gem News Report -
Hanadama, the Grade for Top Quality Akoya Cultured...
Sri Lanka or Madagascar? Blue Sapphire
Sri Lanka or Madagascar? Blue Sapphire
Lotus Gemology
Sri Lanka or Madagascar?
Many clients have asked why some of their blue sapphires get a Sri Lankan origin...
Sotheby’s Hong Kong: Magnificent?
Sotheby's Hong Kong: Magnificent?
"This Autumn Sotheby’s presents Magnificent Jewels I, featuring an exquisite collection of signed jewels, from an Art Deco Cartier Tutti Frutti...
Curious Details of GIA’s July Lab Staff Layoffs
Curious Details of GIA's July Lab Staff Layoffs
Gary RoskinRoskin Gem News Report
In late July, the Gemological Institute of America (GIA), one of the world’s...
Thai Gem Institute Elevates Standards in Collaboration with Chinese Lab [GIT & NGTC]
Thai Gem Institute Elevates Standards in Collaboration with Chinese Lab
Bangkok Post© Bangkok Post PCL
The Gem and Jewelry Institute of Thailand partners with China's...
37th International Gemmological Conference, IGC 2023 Japan
37th International Gemmological Conference, IGC 2023 Japan
37TH IGC CONFERENCE
IGC 2023: 23 -27 OCTOBER IN TOKYO, JAPAN
We, the members of IGC Japan Organizing Committee are...
Seminar: The Origin of Color of Fancy Color Diamonds
Seminar: The Origin of Color of Fancy Color Diamonds
Wednesday, September 6, 11am
After a successful first seminar on the topic of synthetic diamonds back...
Indian Diamond Dealers Claim U.S. Harassment Over Russian Diamond Imports
Indian Diamond Dealers Claim U.S. Harassment Over Russian Diamonds Imports
U.S. 'Harasses' Indian Diamond Dealers Over Russian Gems; Transfers Worth ₹215 Cr Blocked
Responsible, Ethical, & Dealing...
Gemological and Chemical Composition Characteristics of Basalt-Related Rubies from Chanthaburi-Trat, Thailand
Gemological and Chemical Composition Characteristics of Basalt-Related Rubies from Chanthaburi-Trat, Thailand
For the Labs: On Rubies from Thailand
by Enqi Li 1 and Bo Xu 1,2,3,*
1 School of Gemology, China...
Pink Sapphire or Ruby?
Pink Sapphire or Ruby?
On a Personal Note - gr
What is the difference between Pink Sapphire and Ruby? For many of us, the answer is...
