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Carat Weight
The carat (ct) is a unit of mass equal to 200 mg, which is used for measuring gemstones.
CT
MM
0.25
4
0.50
5.2
0.75
5.8
1.00
6.5
1.25
7.0
1.50
7.2
2.00
8.0
3.00
9.20
5.00
11
10.00
14