“Kaleidoscope” in Alexandrite
Pleochroic colors caused by cyclic twinning produce a kaleidoscope effect in alexandrite.
Pseudo-Icosahedral Pyrite in Colombian Emerald
A 2.88 ct Colombian emerald plays host to a metallic yellow pyrite crystal.
Quarterly Crystal: Hiddenite from Idaho
Sail-shaped etch features provide proof that a sample sold as aquamarine is actually a spodumene crystal.
Yellow Radiation Halos in Iolite (Cordierite)
Zircon, monazite, and apatite inclusions surrounded by yellow halos are observed in an iolite cabochon.
Rock Crystal with Cross Inclusion Exhibiting Brownian Motion
Numerous two-phase inclusions form a cross in a rock crystal pendant.
Spiky Inclusion in Padparadscha Sapphire
An inclusion with a metallic luster is observed in a pinkish orange padparadscha sapphire.
Winter 2023 G&G Publication Information
This document provides the publication information for Gems & Gemology