Into the Stone: Photomicrography from E. Billie Hughes
Here we have a close-up of a "fingerprint" inclusion in a Madagascar sapphire, shown before-and-after heat treatment. In this paired photomicrograph series by E....
Holiday 24-Hour Diamond Services at GIA’s Gem Lab
This holiday season, GIA is again offering complimentary next-day Diamond Grading Report and GIA Diamond Dossier® services for submissions to the New York and...
Big Bicolor: GIA Studies Rare 37-Carat Pink-and-Colorless Rough Diamond
...and you thought you were under a lot of stress.
GABORONE, BOTSWANA – The GIA laboratory in Botswana recently examined an extraordinary 37.41-carat pink-and-colorless rough...
LMHC Agrees on Colour Stability Testing, “Cobalt Spinel,” Tanzanite, as well as “Fei Cui”
Getting seven of the world's leading gem labs to agree on anything is no small task. Yet for nearly 25 years, the Laboratory Manual...
GIA Examines Motswedi: World’s 2nd Largest Gem Quality Rough Diamond Crystal
The Gemological Institute of America (GIA) has announced that their research team in Gaborone, Botswana – joined by Tom Moses, GIA Executive Vice President...
“Lab-Grown” is Out, “Synthetic” is Back In: GIT Aligns with CIBJO – and France
Starting October 1, 2025, GIT–the Gem and Jewelry Institute of Thailand's gem testing laboratory–will be updating the way it words its reports to better...
GIA’s “Laboratory-Grown Diamond Quality Assessment Report” – No More Clarity, Color, or Cut!
Now Offers Just Two Tiers — “Premium” or “Standard.”
We’ve been telling you this was on the way — and now it’s official. Starting October...
Four Color Highlights & One Old Mine Cut from Heritage’s Upcoming Fall Fine Jewelry...
Heritage Auctions' September 29 Fall Fine Jewelry Signature® Sale is still a few weeks away, but four loose gems and a mounted diamond are...
Into the Stone: Photomicrography from E. Billie Hughes
E. Billie Hughes, FGA, is a co-founder of Bangkok-based Lotus Gemology, a respected gemological laboratory and educational resource.
A graduate of UCLA, and a Fellow...
Understanding Fei Cui: The Trade Term Now Found on Jade Reports
Beginning June 1st, 2025, jadeite jade authenticity reports issued by Mason-Kay, started to look a little different. Mason-Kay, U.S. jade experts located in Colorado,...
Lotus Gemology: Emerald and Alexandrite in the same stone!
It's not every day you come across a gemstone that brings together two of the trade's most treasured varieties–emerald and alexandrite–in a single, faceted...
Christie’s Magnificent Jewels Auction: The Diamond Report / GIA Graded over 30 Diamond Lots!
As you know, when the Gemological Institute of America (GIA) weighs in on a diamond's quality, the industry pays attention–and rightfully so. GIA isn't...
