GIA's GE POL Data
Internal graining found in 75% of the batch studied
Most of the 900 GE POL diamonds the Gemological Institute
of America has studied are Type IIa fancy shapes of high color
and clarity with a somewhat hazy appearance, GIA President William
E. Boyajian said at the Israeli polished diamond marketing conference
in Tel Aviv in September. Boyajian said GIA found internal graining
in three-quarters of the diamonds.
Boyajian's report is the most detailed yet about diamonds
that have been color-altered using a proprietary process developed
by General Electric Co. Pegasus Overseas Ltd., a subsidiary of
Lazare Kaplan International, introduced GE POL diamonds to the
market this spring.
Some diamonds revealed surface-reaching cleavages or partially
healed fractures and some minute included crystals with a somewhat
altered appearance, Boyajian said. These features are not typical
of D- to G-color diamonds and are subtle, Boyajian later told
Professional Jeweler, but definitely present.
"The GE process involves careful selection of certain
high-purity and high-clarity stones," he said. The active
part of the process involves high temperature and high pressure
conditions, he said.
by Robert Weldon, G.G.
Copyright © 1999 by Bond Communications.