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Author: Admin | 2025-04-28
The best way to measure diamonds is in millimeter. Since diamonds are purchased in carat weight (a standard unit of measurement for diamonds), it is helpful to also measure diamonds in millimeters to determine its surface size as well as ratios such as length-to-width ratios in fancy shape stones in order to choose the best diamond for right budget.Search & Watch Diamonds in 40X 360° HD Videos HERE.Diamond Size ChartAre you interested in knowing the size of a diamond in millimeters based-off its carat weight? You can use the diamond chart below to help you understand the millimeter (mm) size of round cut diamonds.The Round Diamond SizesRound MM SizeRound Carat Weight0.8 mm.0.0025 ct.1 mm.0.005 ct.1.12 mm.0.0067 ct.1.15 mm.0.0075 ct.1.25 mm.0.01 ct.1.3mm.0.01 ct.1.5mm.0.015 ct.1.75mm.0.02 ct.1.8mm.0.025 ct.2mm.0.03 ct.2.225mm.0.04 ct.2.5mm0.06 ct.2.75mm.0.08 ct.3mm.0.11 ct.3.25mm.0.14 ct.3.5mm.0.17 ct.3.75mm.0.21 ct.4mm.0.25 ct.4.25mm.0.28 ct.4.5mm.0.36 ct.4.75mm.0.44 ct.5mm.0.50 ct.5.25mm.0.56 ct.5.5mm.0.66 ct.5.75mm.0.75 ct.6mm.0.84 ct.6.25mm.0.93 ct.6.5mm.1.00 ct.6.8mm.1.25 ct.7 mm.1.30 ct.7.3 mm.1.50 ct.7.5 mm.1.67 ct.7.75 mm.1.75 ct.8 mm.2.00 ct.8.25 mm.2.11 ct.8.5mm.2.43 ct.8.7 mm.2.50 ct.9 mm.2.75 ct.9.1 mm.3.00 ct.9.5 mm.3.35 ct.9.75 mm.3.61 ct.10 mm.3.87 ct.10.25 mm.4.16 ct.10.5 mm.4.41 ct.10.75 mm.4.57 ct.11 mm.4.91 ct.11.25 mm.5.49 ct.11.5 mm.5.85 ct.12 mm.6.84 ct.12.25 mm.7.26 ct.12.5 mm.7.36 ct.12.75 mm.7.52 ct.13 mm.8.51 ct.13.5 mm.9.53 ct.14 mm.10.49 ct.15 mm.12.89 ct.16 mm.16.06 ct.Why Diamond Millimeter measurements are importantThe measurement of a diamond millimeter will inform you about its actual size. This is because diamond weighing similar carat weight can have different faceting and maybe be larger than the equivalent carat weight. In case you are interested in a diamond that has a larger surface, it is important that you consider getting a diamond that is well cut. Shapes such as pear, emerald and oval are known to have a larger look compared to their round counterparts; overall round cut is still considered to have a large surface size though.If you are buying a diamond that is already set in an existing setting, measuring the millimeter of the diamond will help you estimate the carat weight of the diamond. However, it may be tricky to get it measured accurately. It is best to seek the advice of a local jeweler in such cases (note:
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