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Diamonds

General Information

Diamond Cutting

Diamonds - the 4 Cs

  Carat Weight
  Clarity
  Color
  Cut (the most important)

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Gems from the Lab

Moissanite

Diamonds - The 4 Cs

Carat Weight

Diamonds and other gemstones are measured by carat weight. A carat is 1/5 of a gram, or 200 milligrams. (The word carat comes from the carob bean, which weighs about 1/5 of a gram and was used as a measure in earlier times.)

Stones lighter than a carat are measured in points. There are 100 points in a carat. A point is equal to .01 ct.

Caution: Do not confuse this term with karat, the measure used for the fineness of gold.

karat

carat

Shopping Considerations and Caveats

Buyer's Tip

In general, most shoppers prefer a diamond of at least one carat. Consequently, stones that are fractionally smaller than one carat (i.e., .98) can be considerably less expensive. It's worth checking out.

The other 3 Cs...

Clarity 
Color
Cut proportions