What does brilliance refer to in the context of gemstones?

Brilliance in the context of gemstones specifically refers to the amount and quality of light that is returned to the observer's eye after being reflected by the surface of the gem. This quality of brilliance is a critical factor in determining how visually appealing a gemstone appears, as it combines the effects of light reflection, refraction, and dispersion. The more effectively a gemstone can return light to the viewer, the higher its brilliance, which enhances its overall beauty and desirability.

In contrast, the basic color of the gemstone pertains to its hue and saturation, while the growth habit relates to how the crystal forms in nature. The cutting style, although influential in how well a stone exhibits brilliance, pertains more to the techniques used in crafting the gem rather than the intrinsic quality of light reflection itself. Therefore, the relationship between brilliance and light reflection makes the definition clear and distinct within the study of colored stones.