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Diamond Quality:
Color Clarity
Carat Weight Cut |
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Color
While many diamonds appear colorless, or
white, they may actually have subtle yellow or brown tones that can be
detected when comparing diamonds side by side. Colorless diamonds are the
rarest and most valuable of all. Color variations are a result of the
natural forces (i.e., temperature, pressure, trace elements) at work
during the formation of diamonds within the Earth. Because subtle color
variations dramatically affect the value of a diamond, a color grading
scale is used to categorize the shading differences from one diamond to
the next.
Diamonds are graded according
to the GIA (Gemological Institute of America) color chart.
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GIA color grade
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Description |
Appearance |
Relative Industry
Price Comparison for 1 carat VS1 clarity round |
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Colorless |
Stone looks absolutely clear, with no
hint of color to the eye in color grading or mounted |
$8500 |
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$7900 |
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$7500 |
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Near Colorless |
Some color tint is visible during
grading. Mounted in a setting, stone appears colorless. GHI
color diamonds are considered very nice diamonds for fine jewelry. |
$7000 |
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$6400 |
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$5500 |
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$4800 |
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Faint yellow |
Yellow or grayish tint is obvious during
color grading. Mounted, this stone still shows a tint of color |
$4400 |
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$3900 |
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$3200 |
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Light yellow |
Obvious yellow or grayish color |
N/A |
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Fancy |
Bright, remarkable color - usually blue,
pink, yellow |
N/A |
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Clarity
is an indication of a diamond's purity. Clarity is determined by a
diamond's naturally occurring internal characterstics. These
characteristics are sometimes not visible to the naked eye and they are
what make each diamond unique. The characteristics, or inclusions, may
look like crystals, feathers, clouds or dark spots and the quantity, size,
and location of these inclusions does have an affect on a diamond's value.
Diamonds with fewer and smaller inclusions generally are more brilliant,
assuming that the color and cut are the same.
The U.S. Federal Trade Commission has
established the jewelry industry's standards for diamond clarity based on
10-power magnification. A diamond is graded by its relative departure from
"flawless"--the complete absence of inclusions under 10x magnification.
Less than 1% of all diamonds ever found have
had no inclusions and can be called flawless (FL) or internally flawless
(IF). VVS diamonds are also extremely rare. VS diamonds are of
superior quality and are used in extremely fine jewelry. This clarity
grade becomes more important as the diamond size increases. A large
percentage of jewelry is made with SI quality diamonds. These diamonds are
perfect for diamond studs or multi-stone diamond earrings, rings and
bracelets or as accents in gemstone rings. I quality diamonds are
acceptable as well for diamond jewelry or as accents but the sparkle is
reduced by the number and location of inclusions.
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Clarity Grade |
Description |
Appearance |
Relative Industry Price Comparison for 1
carat G color Round |
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Flawless |
Clear stone, free of all flaws, even
under 10x magnification |
$9000 |
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Internally Flawless |
No inclusions visible at 10x
magnification |
$8000 |
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Very Very Slight Inclusion #1 |
Tiny inclusions are extremely difficult
to find, even under 10x magnification |
$7500 |
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Very Very Slight Inclusion #2 |
Tiny inclusions are very difficult to
find, even under 10x magnification |
$6500 |
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Very Slight Inclusion #1 |
Minor inclusions are difficult to see
under 10 x magnification |
$7000 |
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Very Slight Inclusion #2 |
Minor inclusions are somewhat difficult
to find under 10x magnification |
$6000 |
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Slight Inclusion #1 |
Inclusions are easy to see under 10x
magnification. These diamonds are considered "eye clean" since
inclusions can not been seen with the naked eye. In larger diamonds
very very small inclusions may be visible and still be classified as
SI1. |
$5500 |
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Slight Inclusion #2 |
Inclusions and/or blemishes are easy to
see at 10x. These diamonds are considered "eye clean" since
inclusions can not been seen with the naked eye. In larger diamonds
very small inclusions may be visible and still be classified as SI2. |
$4500 |
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Included #1 |
Inclusions and/or blemishes are obvious
and rather easy to see without magnification. |
$3700 |
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Included #2 |
Inclusions and/or blemishes are obvious
and easy to see without magnification |
$2500 |
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Included #3 |
Inclusions and blemishes that are
obvious to the unaided eye |
$1300 |
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Carat
Diamonds are measured in terms of weight, not size. The heavier the
diamond, the greater the carat weight. Two diamonds of equal weight can
have very different values, because the quality is still determined by the
color, clarity and cut. As diamonds increase in size, their cost
tends to increase exponentially rather than arithmetically. Thus, a
one-carat diamond can cost significantly more than a one-half carat
diamond of equal quality. The weight of a diamond less than one
carat in size may also be described in terms of "points". There are
100 "points" in 1 carat.
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Carat Weight |
Diameter |
Relative Price Comparison for H color,
SI1 clarity Round |
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0.03 carats |
2 mm |
$680/carat |
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0.10 carats |
3 mm |
$760/carat |
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0.25 carats |
4 mm |
$1300/carat |
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0.45 carats |
5 mm |
$2200/carat |
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0.50 carats |
5.2 mm |
$3100/carat |
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0.80 carats |
6 mm |
$4300/carat |
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1.25 carats |
7 mm |
$6000/carat |
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Cut
Diamonds mined from the earth look like tumbled gems or beach glass.
To turn the diamond into a beautiful gem, the diamond is cut with precise
facets, or tiny polished faces. There are 58 total facets on the round
brilliant diamond: 33 facets are in the crown and table (largest facet)
located above the girdle (the diamond’s widest point), 24 facets in the
pavilion and 1 facet at the bottom, or culet.

A well cut diamond will have
an amazing brilliance and fire. This is caused by white light reflecting
off the diamond’s surfaces and the mirrored depths of the pavilion. The
key to desirable fire and brilliance is proportion. Light striking a
shallow cut diamond will fall out the other side and not reflect back to
the top. Light striking a deep cut diamond will get lost in the pavilion
and also be unable to reflect back to the top.

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