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How the carat weight of a diamond affects its value.
A diamond's weight in carats is one measure of its value, along with the other 3 of the "4 Cs:" carat weight, cut, color and clarity.
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| Carat
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0.05 |
0.10 |
0.20 |
0.25 |
0.30 |
0.40 |
0.50 |
0.70 |
0.90 |
1.00 |
1.25 |
1.50 |
1.75 |
2.00 |
2.50 |
3.00 |
| Øm/m
|
2.5 |
3.0 |
3.8 |
4.1 |
4.5 |
4.8 |
5.2 |
5.8 |
6.3 |
6.5 |
6.9 |
7.4 |
7.8 |
8.2 |
8.8 |
9.4 |
| hm/m
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1.5 |
1.8 |
2.3 |
2.5 |
2.7 |
3.0 |
3.1 |
3.5 |
3.8 |
3.9 |
4.3 |
4.5 |
4.7 |
4.9 |
5.3 |
5.6 |
Diamonds are among the rarest of materials on earth; every diamond, of every size and quality, has a definite value. The size of a diamond is measured in its carat weight. One carat = 1/5 of a gram. Carats are further divided into 100 points. Diamond weight may sometimes be expressed in points or in carats: a "75 point diamond" weighs 3/4 of a carat.
Large diamonds are far more rare than smaller ones. Large diamonds are highly prized because of their rarity and because larger diamonds, when cut, have more brilliance. Carat for carat, a large diamond will cost more than a smaller one.
It is difficult to judge the carat weight of a diamond by its apparent size; diamonds of the same diameter may weigh more or less than each other because of the way they are cut.
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