+18 Do Diamonds Glow Under Black Light References. Diamonds with medium to very strong blue fluorescence will react to uv light by exhibiting a ghostly blue hue. Web diamond fluorescence, in its most simple form, is the effect that ultraviolet (uv) light has on a diamond.
Under ultraviolet (uv) light, a diamond emits a soft glow. Web diamonds can emit glows differently in terms of color or color intensity under black light. This is due to the presence of fluorescence, which is caused by impurities in the diamond.
