Perfect Diamond Dimensions Round

The tolkowsky ideal cut.

Perfect diamond dimensions round.

If you have a stone with perfect diamond proportions the diamond will refract the light in an excellent way. This is exactly what you are looking for in a beautiful diamond. Due to the mechanics of its shape the round diamond is generally superior to fancy diamond shapes at the proper reflection of light maximizing potential brightness. In 1919 the mathematician and renowned gemologist marcel tolkowsky published his findings for the perfect diamond proportions in his thesis entitled diamond design a study of the reflection and refraction of light in a diamond all diamonds that were within the parameters of the so called tolkowsky ideal cut were considered to have an excellent light return.

Please note that gia does not assign a cut grade to fancy cut stones such as princess cut or cushion cut yet but still these proportions are critically important in analyzing the cut. The round cut diamond is the most popular diamond shape representing approximately 75 of all diamonds sold. You might have heard about the fact that the exact diamond proportions determine the cut of a diamond. However if the proportions of a diamond are.

Marcel tolkowsky revolutionized the world of round brilliant diamonds in 1919 when he published his landmark book titled diamond design. This article has two sections. Round diamonds a complete guide. In his book he wrote about a set of proportions that would yield in a diamond with maximum beauty fire and scintillation based on mathematical calculations.

Ideal cut diamond proportions and brilliance. For a round diamond an ideal depth percentage is between 59 and 62 6 percent this very nice 1 30 carat round cut for example has a depth of 61 8. Like with the ideal diamond table percentages we listed above these ranges are intended as general guidelines only.