This 1.05 ct pear shape (9.81 x 5.95 x 3.06 mm) was color-graded as equivalent to G. In addition to pinpoint inclusions, it contained some feathers and fractures along the girdle, and its clarity grade was equivalent to I1. No fluorescence was observed when it was exposed to conventional long- and short-wave UV radiation. The infrared absorption spectrum indicated that the sample was type IIa. Images taken with the DiamondView, which employs strong ultra short-wave UV radiation, showed strong orange-red fluorescence with some irregularly shaped regions of blue fluorescence. Photoluminescence spectra collected at liquid-nitrogen temperature with laser excitations from the UV to IR regions revealed features typical of a CVD synthetic diamond, and this identification is consistent with its other properties.
GIA Laboratory, New York