Purchased at an antique mall near Boyd Glass, a famous glass manufacturer in Ohio, USA. One uranium glass marble. #OurUraniumGlass ■ Product Features • Vivid Fluorescent Color: When exposed to a black light (UV light), it glows with a vibrant neon green unique to uranium glass. Please note that it does not glow in the dark (i.e., it is not phosphorescent). • Vintage Texture: It has a warm texture and a unique color blend not found in modern mass-produced items. • Origin in the Boyd Area: Purchased in an area famous for glass crafts, making it a valuable item for collectors. ■ Condition As an antique/vintage item, there may be minor scratches or air bubbles. We hope that those who appreciate this as part of its character will purchase it. There are no major chips or cracks, but there are scratches as shown by the pink lines in the photos. (※Please check the photos for details) ■ Size Diameter: Approximately 15-16mm Standard small marble size ■ Shipping Yu-packet Post We will carefully pack it with cushioning material (bubble wrap) to prevent breakage and deliver it via anonymous shipping. ※Note The appearance of the photos taken under black light may differ from the actual item depending on the shooting environment. Please be aware of this. It seems to glow more strongly than in the photos. We do not have a Geiger counter, so we cannot measure the radiation level. We cannot offer refunds or returns if you are not satisfied with the readings from your own counter.