Diamond Standard – Carat

Diamonds with the same carat weight can vary enormously in their style of cutting. Cut depends on the nature of the rough, the polisher, and the different proportions of cut that are sought in various markets, since not all markets have the same preference.

Very often the skill of the cutter, whose task it is to maximize the yield from the rough stone, will result in an overall higher carat weight than the smaller stone which has been handled differently at the cutting stage.

As with all precious stones, the weight of a diamond is expressed in carats. The word carat originated in a natural unit of weight: the seeds of the carob tree. Diamonds were traditionally weighed against these seeds (which are remarkably consistent in weight) until the system was standardized and one carat was fixed at 0.2 grams (one fifth of a gram). One carat is divided into 00 “points” so that a diamond of 25 points is described as quarter of a carat or 0.25 carats.

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