A fact about opals, including white opals, is that they have the ability to fluoresce under ultraviolet light. While most people recognize opals for their mesmerizing play-of-color in normal lighting conditions, not as many are aware that some opals can also emit a soft glow when exposed to black light. This fluorescence is due to the presence of certain impurities within the opal’s silica structure, which react to the ultraviolet light. Different opals may fluoresce in various shades, often showing colors like green, yellow, or blue. It’s a hidden feature that only reveals itself under specific conditions, adding another layer of mystery to this already captivating gemstone.
