Diamond weight is measured in carats, a small unit of measurement equal to 200
milligrams. Each carat is divided into 100 points. Therefore, a half-carat
stone may be referred to as a "50-pointer" or "50-points". Carat weight is the
easiest of the 4 C's for gemologists to determine because of the use of
sophisticated measuring equipment.
Two diamonds of equal carat weight might vary greatly in value depending upon
their cut, color and clarity. This is important because when mounted, one
diamond may appear larger than the other, although they actually weigh the
same. Because large diamonds are rare, they generally have a greater value per
carat. For example, the price of a two-carat stone will be several times higher
than four 50-pointers of equal quality.
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For an easy comparison of price and size, see the
illustration below. Prices are approximate and based upon an excellent cut, G
Color, VS2 clarity, diamond:
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0.50ct
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0.75ct
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1.00ct
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1.50ct
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2.00ct
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5.2mm
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5.8mm
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6.5mm
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7.4mm
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8.2mm
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Determining the carat weight that is right for her is a simple choice.
Consider the size of her fingers. If she has a fairly small ring size, a
smaller diamond will look proportionate on her hand. Find a moderate balance
between the color and clarity grades to see how much carat weight you can get
for your budget. Also, bear in mind the width of your engagement setting. Find
a carat weight that complements the setting nicely without overpowering it, and
vice versa.
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Diamonds
