Emeralds in Catherine de’ Medici’s Pendant: An Unexpected Geographic Origin
Archival research and gemological characterization reveal the geographic origin of two emeralds set in a pendant linked to Catherine de’ Medici, Queen of France from 1547 to 1559.
Update on Montana’s Rock Creek Sapphire
Paraíba Tourmaline Melee: An Entry-Level Market Perspective
Black Opal with Unique Play-of-Color
A black opal cabochon set in a ring displays vivid orange play-of-color.
Rare Gem-Quality Viitaniemiite
A Study of the Winston Red: The Smithsonian’s New Fancy Red Diamond
Presents the first scientific and historical study conducted on the 2.33 ct Winston Red, the fifth-largest known Fancy red diamond in existence.
“Rime Ice” on Trees in Jeremejevite
In Memoriam: Henry A. Hänni
Nature-Inspired Jewelry
Heated Corundum, the Remarkable Winston Red, and an Extraordinary Renaissance Jewel
Surfite: A Surfboard Manufacturing Byproduct
World Events Carved in a Shell
“Enhydro” Amethyst from Morocco
Rare Faceted Väyrynenite
Uniquely saturated examples of the collector stone were on display at GJX.
Phenomenal Gems
A look at the most popular phenomenal gems exhibited at the 2025 Tucson gem shows.
Assembled Bead Cultured Half-Pearl
Investigation in the Carlsbad laboratory reveals a pearl submission is not mabe as initially believed.
Checkered Pattern on Diamond
Enormous South Sea Cultured Pearl with Filled and Partially Hollow Structure
Examination of a gigantic South Sea bead cultured pearl reveals an intriguing internal structure.
.jpg "YMAL GIA Ed")
