Sapphire from Montana’s Secondary Deposits, Colombian Emerald Morphology, the 2023 Tucson Shows, and More…
Pezzottaite with Multiple Cat’s-Eyes
Acicular Troughs Coincident with Green Stains on Rough Diamond Surface
The author acquired an alluvial rough diamond from Guyana showing unique surficial features that do not appear to have been documented elsewhere.
Unusual Aquamarine–White Beryl
More on Virtu Gem’s Ethical Supply Chain Practices
An update on Virtu Gem’s mission to improve artisanal mining and gem trading practices in Kenya, Malawi, and Zambia.
Hydrophane Opal Treatment
An opal rough is immersed in water and treated with oil and Opticon to observe effects on transparency and play-of-color.
Texas Topaz, Slovak Opal, a Beryl Inclusions Chart, and More
Quarterly Crystal: Unique Phantom in Diamond
The Fluid Art of Angela Conty
Age, Origin, and Emplacement of Diamonds: Scientific Advances in the Last Decade
