Extinction

In jewelry, extinction refers to areas in a gem where light does not reflect, often perceived as dark spots.

Part of speech: noun
Definition: Extinction in the context of the jewelry industry specifically pertains to the phenomenon observed in certain gemstones, where some regions appear dark due to the complete absorption of light, rather than reflecting it. This effect can detract from the overall brilliance and sparkle of a gem, impacting its aesthetic appeal and value. The degree of extinction can vary based on the gemstone's cut, quality, and the angle of light incidence. Professional cutters strive to minimize extinction through precise cutting techniques, aiming to maximize light reflection within a gemstone and enhance its visual appeal. Careful selection and viewing of gems under multiple light sources can help in identifying and assessing the impact of extinction on a particular gem's beauty.