If you spend any time at all at flea markets, estate sales, or looking at collectibles on eBay or Etsy, you’ll find that uranium glass is popular among seekers of all things vintage.
Uranium glass (also known as “Vaseline” glass due to its petroleum jelly color) contains uranium oxide. If you place it under a black light, it glows. That glow means it’s radioactive. While the levels of radioactivity are usually quite low, it varies from item to item. This glassware is safe to own, but not to use, especially in a microwave.
Uranium glass is relatively inexpensive, but some pieces, depending on the designer and era, can be quite valuable. Here are some items that sold for considerably more than usual in recent years.