The Hybrid Diamond Color Grading Master Set: How Cost and Availability Caused a Revelation
By now, you’ve probably seen press releases from AGA (Accredited Gemologists Association) and GCAL by Sarine, announcing the new Hybrid Master Set—a diamond color...
Christie’s Headliner, the 23.24-carat “Golconda Blue” Pulled
The 23.24-carat “Golconda Blue” fancy vivid blue diamond has been unexpectedly pulled from the May 14 Christie’s Magnificent Jewels sale, says Anthony DeMarco, contributing...
Photomicrography: Images from Within
Photomicrography: Images from Within
Images by Sammantha Maclachlan
Sammantha Maclachlan FGA DGA FIRV MJVA AJP PJDIP CPAA - JVA Registered Valuer®️
Winner of the Gordon Ness trophy...
Guatemalan Jadeite Jade – A New Look for an Ancient Treasure
The market for fine Type A jadeite jade, free of any and all treatments and enhancements, is undeniably centered in East Asia. There, buyers...
Aussie Horse Racing Shows Three “Gems” in this Year’s Season
Always looking for a fun use of our language in other industries, sports tend to use "gem" quite a bit, mostly referring to outstanding...
An Open Letter to the Gem Industry… A Reality Check: Understanding the Zambian Emerald...
The following is an open letter to the gem industry from Victor Kalesha, President of ESMAZ, the Emerald and Semi-Precious Stones Mining Association of...
Zambian Tax Could Hike Emerald Prices: Just when Gemfields thought things couldn’t get worse
Last week, we reported that Gemfields was cutting costs due to lower-than-expected emerald auction results. It was noted that competition from Zambian producers had...
Professor Dr. Henry A. Hänni: Former Director of the SSEF, died January 9th, 2025...
Professor Dr. Henry A. Hänni was a pioneering gemological scientist, educator, and mentor whose contributions have shaped the modern field of gemology. He served...
Sotheby’s Geneva November Diamond Recap – Several Lessons in Color Grading
The Magnificent Jewels Sale this past November in Geneva featured quite a few fancy color diamonds, with four that really caught our attention. -...
Sotheby’s New York: Catching up from the Holidays with a few Can’t Miss Jewels!
We don’t often revisit past gem news, but the "Magnificent Jewels" auction of December 11, 2024, showcased exceptional colored diamonds, gemstones, and vintage pieces...
The 2024 Roskin Gem News Report’s Top 25!
Here it is—our first-ever Top 25 list of the most-read gem news features in the Roskin Gem News Report for all of 2024! -...
Following Renovation, the Yale Peabody Museum’s Mineralogy Galleries Reopen with Selections from One of...
Following Renovation, the Yale Peabody Museum's Mineralogy Galleries Reopen with Selections from One of the World's Most Important Private Mineral Collections
Yale University Press ReleasePRNewswire
"The...
