The refractive index of diamonds

The refractive index of diamonds is an optical property that describes how fast light moves compared to light in an empty space (vacuum). In the case of a diamond, the refractive index is usually around 2.42. This property is important when determining the luster and brilliance of a diamond. A higher refractive index usually means that the diamond has a greater ability to refract light, resulting in greater luster and brilliance

. Diamonds have the highest refractive index of all gemstones except moissanites. This is one of the reasons why diamonds are considered such attractive gemstones. The refractive index can vary depending on various factors, including the type and quality of the diamond, its clarity as well as color. It is one of the many characteristics that are examined and graded in gemological laboratories when assessing and certifying gemstones.