The 4Cs of Diamonds: Diamond Weight

Diamond weight is described using two terms: carat and point.   Carat is determined by measuring the distance across the top of diamond and is always listed in millimeters.  When measuring diamond weight it is important to factor in the cut grade.  In a well-cut diamond, the maximum amount of light enters and exits through the table making the diamond look larger than a poorly cut stone.

Like color and clarity, carat weight is a key factor in determining the value of a diamond. Diamond prices vary by carat weight increasing at the full and half-carat weights.  Diamonds just below these weight changes will be less costly and a majority of the time size is undetectable.  For example, a 1.00ct diamond will be in a different price point than a .98ct diamond, but the size will not be noticeable.   Also, since larger diamonds are more rare and costly than smaller diamonds a 1.00ct single diamond will cost much more than several smaller diamonds equaling a total carat weight of 1.00ct.

Diamond Measurements

Carat = 100 points or 200 milligrams

Point = 0.01 or one-hundredth of a carat

diamond weight chart

What carat weight is right for her?

There are several important factors to keep in mind when determining carat weight.

Price – diamond cut, we feel, is the most important of the 4Cs and you should always choose a well cut stone over weight.  If carat weight is important to you and you would like a larger stone, you have some flexibility in terms of price with color and clarity.

Finger size – a 1.00ct diamond will look much larger on someone with a size 4 finger than a size 8 finger.

Setting – certain settings can make a diamond appear larger than it actually is.  Our personal shoppers can help you determine which setting is right for you if you don’t already have something in mind.

Visit our education section for more on diamond weight

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