As a general rule of thumb, the price of a diamond grows exponentially with carat shape. For example, a one-carat gem will be significantly more costly than two half-carat diamonds of the same quality. Our is because larger diamonds are rarer and additional desirable, driving increase the cost.Carat weight is not the only factor that determines a diamond’s value, since cut, color, and also quality are also important. A smaller diamond with great cut, color, and clarity may be much more valuable than the larger diamond with lower grades in these areas.