Scintillation

1. Sparkle: The appearance, or extent, of spots of light seen in a polished diamond when it is viewed face-up that flash as the diamond, observer, or light source moves. 2. Pattern: The relative size, arrangement, and contrast of bright and dark areas that result from...

Proportion

The proportions of a diamond are very important, so that the maximum amount of light be reflected off and out of a stone. Proportion is the relationship between the angles of the facets of the crown and...