Learn how fluorescence is a form of illumination created when a diamond is exposed to ultraviolet light and affects the beauty and value. br br This is #7 of a series of video tutorials on how to buy a diamond and engagement ring. br br Our diamond buying guide videos will give you the best diamond education before making your engagement ring or anniversary band purchase. br br INTA Gems & Diamonds is proud to be the Official Jeweler of Miss California USA®. Our diamond jewelry adorns Miss California USA® to red-carpet engagements including the Miss USA® pageant televised live on NBC.