Uranium glass occupies an little-known niche in the collectibles world, whose members appreciate its soft colour and distinctive glow, which comes from the uranium added as the glass was created. The glass is slightly radioactive, enough to register on Geiger counters. But the levels are about the same as electrical appliances like microwave ovens emit, so they represent no threat to health. REUTERS/Stefan Wermuth SEARCH "RADIOACTIVE VINTAGE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: URANIUM-GLASS/