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Diamonds are weighed in carats, or fractions of carats. For example, the weight of a 1-carat diamond will be written as 1.00 ct. and said as "1 carat" or "100 points", and if a diamond were to weigh fractionally more than 1 carat eg. 1.01 cts, this would be called "one hundred and one points". It is important to realise that it is not about the physical size of a diamond, it is all about the weight on an electronic scale.
The price per carat does not increase smoothly with increasing size. Instead, there are sharp jumps around milestone carat weights, as demand is much higher for diamonds weighing just more than a milestone than for those weighing just less. As an example, a 0.95 carat diamond may have a significantly lower price per carat than a comparable 1.05 carat diamond, because of differences in demand. |