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CARAT
  • Equipment:high-precision digital scale, diamond gauge
  • The weight of a diamond is the simplest indicator of its value. Like other rare gemstones, the value of a diamond increases exponentially with weight, especially above 1 ct. In the past, different - often inaccurate - instruments were used to determine the weight of a diamond, but now digital scales have made the situation clear.

    The weight of diamonds is given to two decimal places like the accepted international standards. The millesimal value is rounded up, for example a 0.124ct is shown in the certificate as 0.12 ct, while a 0.125ct is reported 1,13ct. Similarly, the diameter is also rounded. For example, diamonds of 1.2mm in size range from 1.15mm to 1.25mm.