The millimeter tells you the true size of the diamond. With our diamond carat charts you can understand the millimeter differences between round and fancy . What is the millimeter size of a 1 carat Round Cut Diamond? Use our diamond size chart to predict the carat weight by the mm diameter of a round diamond. Our helpful guide breaks down diamond sizes by diamond shape and millimeter . the millimeter (mm) size of each diamond shape. Diamond Size Chart. Round. Learn how diamond carat weight affects size and price. Compare actual size diamonds of different carat weights using a printable size chart. . Size, Round 1 ct. Carat is a unit of weight (mass) and size refers to dimensions measured in millimeters (mm). The size of a 1-carat round brilliant diamond can range from approximately 6.20 mm to 6.80 mm in diameter, depending on the depth. A deep cut is smaller in diameter and a shallow cut is wider in diameter. 19 de abr de 2017 - *Sizing is based on averages for a brilliant round diamond. Consult with a professional member of our Diamonds.Pro team for more details. The following diamond size charts and tables will help you visualize how a . the standard 57 facets round brilliant cut is the most popular choice of shape. We've estimated the average diameter (mm) for excellent cut round diamonds using measurements listed on Blue Nile. Many diamond size charts tend to . Diamond Nexus Gemstones. Click on the the cut to view its millimeter to carat conversion chart. Round; Princess; Asscher; Marquise; Radiant; Cushion; Pear .