Inclusions in Diamonds

Abstract

Diamonds frequently contain inclusions. These inclusions can alter the appearance and transparency of a diamond and are often undesired constituents in gemstone diamonds. On the other hand, the inclusions can provide insights into the origin of the diamonds. Although inclusions can be found in all morphological types of diamonds (i.e. monocrystalline, fi brous, and polycrystalline diamonds) the characteristics of the inclusions can be quite different for each diamond type. Monocrystalline and polycrystalline diamonds, for example, typically contain inclusions of other minerals, whereas fibrous diamonds usually contain inclusions of fluids.