Take “Vaseline glass.” For centuries, glassmakers would use small amounts of uranium to create dish ware named for its yellow or green tint that, when put under a UV light, caused the glass to ...

delphite (opaque pale blue), cobalt blue, red, black, amethyst, monax, white (milk glass), and even fluorescent uranium glass that glows under UV light. In addition to kitchenware, items like ...