Distinction of Natural and Synthetic Ametrine by Microscopic Examination—A Practical Approach

Abstract

A new approach for microscopically distinguishing natural from synthetic ametrine is described on pp. 506-529 of this issue. Shown in this composite photo are three custom-faceted natural ametrines: a 19.87 ct round StarBrite cut, a 20.35 ct cushion ZigZag cut and a 13.69 ct square StarBrite cut.