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Gemstone Weight Calculator from Dendritics

Carat Weight Calculator. How to measure carats when a stone is mounted. Using our Proprietary Advanced Formula for Round, Emerald, Marquise, Radiant, and Oval cuts which takes into account the culet size, shape of the sides, roundness of the belly, variations in the girdle as well as table proportion.

New for 2019! Add up a series of carat weights, no need to write them down and use a calculator. 5 rubies in a ring or 100 diamonds in a necklace. If you make a mistake, uncheck it in the list and keep on going. Stone Identification. is now separate.

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