Two Synthetic Diamonds showing Features that can be misidentified for Natural

Abstract

Identification of synthetic diamond requires advanced laboratory techniques such as FITR, photoluminescence (PL) analysis or DiamondView^TM analysis as well as standard gemological tests. In this report two kinds of synthetic diamond, which show features that make the stones appear as natural, are introduced. (1) a brown CVD synthetic diamond showing distinct linear color zoning under magnification and (2) a yellow HPHT synthetic diamond showing B2 center (platelet) and a C-H related peak in FTIR analysis. As these features only by themselves can be misidentified as those of natural diamonds, it is critical to identify a stone comprehensively by combining them with other analytical techniques.