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FIRE IN THE EARTH
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scientific
institute or society indicating that these reflectors are necessary to
exactly counteract the yellow in artificial light.
For
instance, the American Gem Society interprets the Federal Trade
Commission rules about unfairness in representing a blue-white, which
shows any tint other than bluish, as referring to its "body color." It
recommends to its members that they examine diamonds for body color
against a white background. "If you find," it says, "that in selling
you, a jeweler has violated any ruling of F.T.C. Rules, notify the
Federal Trade Commission, Washington, D. C, which will then take steps
to prohibit future violations by that jeweler."
A
Federal Trade Commission rule specifies as an unfair trade practice the
use of the word "perfect" (or any other term of similar
import—"commercially white," or "commercially perfect" or "perfect
cut") as descriptive of any diamond "which discloses flaws, cracks, carbon spots, clouds or
other blemishes or imperfections of any sort when examined by a
trained eye under a diamond eye loupe or other magnifier of not less
than ten power." The Gem Society has been recommending instead of
"perfect" the use of the term "flawless" to describe a diamond which is
"free from all internal and external blemishes, or faults of every
description under skilled observation, with a ten-power loupe corrected
for chromatic and spherical aberration."
The
scientist knows that absolute perfection rarely, if ever, occurs in
nature, any more than it does in man. The trade term "perfect,"
however, has been established by long use and abuse. Some retailers,
the Gem Society finds, class as perfect any diamond in which they can
see no imperfections inside the stone, either entirely enclosed or
extending to the surface. Such imperfections, though, include:
Long slivers or fissures in surface; cleavage cracks; white
(232)
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