Diamond diameter and diamond weight comparison table

The unit of weight of a diamond, the unit of diamond weight, is usually abbreviated as "ct" and 1 carat = 0.2 g. The sub unit is divided into 1 carat = 100 points.

The impact of carat weight on value The value of a diamond is roughly proportional to the square of the carat's mass, and it is a stepwise increase in the price of an integer carat, called the "carat step." If the price of diamonds above 1ct is higher than 0.9ct, the price of diamonds should be higher. When diamonds were mined, large diamonds were found to be significantly less than small diamonds. It is precisely because of this that, with diamonds of the same quality, the value ratio of two-carat diamonds to one-carat diamonds is much greater than the weight ratio.

Diamond Weight Classification Diamond weight classification refers to the weight of a diamond that is weighed to determine the value of the diamond.

Conversion between diamond weight units:

1g = 5 carats 1 carat = 100 cents Carat weight units, requiring the retention of two digits after the decimal point, followed by a decimal one.

Standard round diamond diameter and weight comparison table

Diameter (mm) Approx Weight (.ct) 1.30 0.01 1.70 0.02 2.40 0.05 3.00 0.10 3.40 0.15 3.80 0.20 4.10 0.25 4.50 0.30 4.90 0.40 5.00 0.45 5.20 0.50 5.50 0.60 5.80 0.70 6.00 0.80 6.30 0.90 6.50 1.00 7.00 1.25 7.40 1.50 8.00 1.80 8.20 2.00 9.20 3.00