Feature Gems & Gemology, Summer 2010, Volume 46, No. 2

Hibonite: a New Gem Mineral

A 0.23 g orangy brown crystal, a 0.39 ct step-cut gem later faceted from it, and a 0.71 g crystal—all reportedly from Myanmar—were characterized for this report. Infrared spectroscopy, X-ray diffraction, and chemical analysis dentified the material as hibonite. These samples represent the first gemquality hibonite ever recorded.