Enjoy complimentary delivery. Experience the joy of receiving the Le Lumiere products right at your doorstep.

Carat in 4cs

Diamond Carat (ct.)

One of the most important characteristics that determine a diamond’s value is its weight – the diamond’s carat. And as a starting point, a diamond is more valuable the bigger it is.

Karat vs. diamond carat

The weight of a diamond is measured in carats, and must not be confused with carat, which is the designation for the purity of gold. Carat Weight (CT) is the metric unit to measure the mass of diamonds. This unit of measurement was derived from early gem traders using carob seeds as their counterweights. The standard equivalent of 1 carat is 0.2 grams or 100 points. In general, as the weight of the diamond increase, the value will increase exponentially due to its rarity and desirability.

Learn more about carat

1 diamond carat
= 0.20 grams

1 carat is the same as 0.20 grams, so a 5.00 carat diamond weighs exactly 1 gram.

The carat of the diamond is an ancient unit of weight that has been used by diamond merchants for many thousands of years. The unit of weight originates from India, where some of the first diamonds were mined and traded. To weigh the diamonds, the kernels of the carob tree were used as weights; a core weighs about 1 carat in the dried state.

The diamond's carat can be calculated using a formula

A diamond’s dimensions determine its weight. The carat weight of a well-proportioned round brilliant can be calculated with a special formula – this is accurate for 95% of round brilliants.

Generally, however, the carat is measured with a delicate diamond scale. The carat of the diamond is always indicated to two decimal places.