Diagnostic microscopic features include growth and color zoning as well as oriented needle-like tubes and cone-shaped voids (“nailhead spicules”) that are typically associated with small chrysoberyl ...

(PRESS RELEASE) DALLAS — The American Gem Trade Association (AGTA) announced the winners of the 2024 AGTA Spectrum & Cutting Edge Awards. This year is extra special because it marks 40 years of ...