Spectroscopic Characteristics of Treated-Color Natural Diamonds

Figure 2

A broad range of internal characteristics were noted with magnification, including natural mineral inclusions and some graphitized inclusions, as well as color zoning and etched facet near to the girdle. In addition, anomalous birefringence with high interference colors was also observed.

(a) TR-1

(b) TR-10

(c) TR-10

(d) TR-7

(e) TR-6

(f) TR-5