US$155,552,014! Auction Results Top Estimate, Even Before Day 2
$155,552,014! Auction Results Top Estimate, Even Before Day 2
Record Broken
The anticipated auction results of $150 million for the private collection of Heidi Horten, Christie's...
Report by GSI: Rare phosphorescence in CVD Lab Grown Diamond
Diamond World News Service | Sept 29 2022 - Diamondworld.net -
Lab Grown Diamonds have gained increased popularity in recent times. Today’s cutting-edge technology...
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...
Phillips Hong Kong Auction Features Vivids
Phillips Hong Kong Auction Features Vivids
Gary Roskin - Roskin Gem News Report -
Fancy Vivid color diamonds are outstanding rare beauties in the gem...
GIA & AGS “CONVERGE” – Symposium and Conclave September 7-10, 2025
GIA & AGS "CONVERGE" - Symposium and Conclave September 7-10, 2025
AGS and GIA Announce Joint Event for September 2025 - ‘Converge’ brings together AGS...
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...
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...
GIA Live Online
GIA Live OnlineAdvanced Laboratory-Grown Diamonds
LIVE ONLINE | July 18-19, 2023, 8 AM- 4 PM PT | Cost $995 | This seminar builds on GIA's...
Describing Color in Gems • A Fool’s Guide
Describing Color in Gems • A Fool's Guide • Lotus Gemology
Richard W. HughesLotus Gemology
What is the finest blue, or the finest red?
In truth, there...
It’s Just Business
It's Just Business -
Sarine Signs MOU to Acquire Majority Stake in GCAL
Sarine, the leading manufacturer of artificial intelligence measuring devices for the gemstone industry,...
GIA’s Colored Stone Origin Determination Seminar
GIA's Colored Stone Origin Determination Seminar
The Continuing Education division of GIA's Alumni Collective is now offering new self-paced continuing education seminars on Ruby, Sapphire,...
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...
