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Weight Estimation and Measurement
Gemstones are most frequently sold by weight or calibrated measurements. There is an important relationship between carat weight and price so using accurate scales, balances, and diameter gauges is essential if you are dealing in the trade. Density can also be a key factor in gemstones identification, for example, no matter what the size, shape, or weight, gem quality diamond will always have a specific gravity of 3.52.
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