Boyd's Glass 1950's Red Yellow Candy Dish Swan Glows Due To cadmium and selenium

Boyd's Glass Red Yellow Swan Candy Dish glows with black light due to cadmium and selenium. Pictures do not not show how much it glows Vintage from the 1950s Rare first five years Boyd’s Crystal Art Glass cadmium and selenium slag glass swan dish in pristine condition with no chips or cracks. Diamond and no line stamp.