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Uranium Glass
This is a space for collectors to answer any questions about uranium glass that people may have. I'd like to start with some questions I get pretty often (and that were recently asked by the admin of the instance, Wintermute): >How much Uranium is in the glass anyway? Should you even be holding that? The actual uranium content in uranium glass is usually between trace amounts and 2% by weight, but you can find pieces that are up to 25% uranium by weight. (Source: [ORAU Museum of Radiation and Radioactivity](https://www.orau.org/health-physics-museum/collection/consumer/glass/vaseline-uranium-glass.html)) Many of my pieces, when measured with a Geiger counter, are within what's considered a low-risk range of radioactivity. Some people use their uranium glass, but I prefer to keep my handling of it to a minimum. > I think it only fluoresces like this under black light, right? Does it just look like normal glass in natural light? UV light in general causes the glass to fluoresce. Black lights get you the best results, but some pieces fluoresce quite brightly under direct sunlight. Under natural light, most pieces are a transparent yellow-green. > Do they still make this stuff today, or is it all vintage? Some companies make it today, but the majority you'll find is vintage. The majority of my collection is from the 1910s-1930s, with a few pieces from the 1970s! > Where do you find it? If it’s mostly thrift stores and that kind of thing, do they usually know what it is or do they just think it’s regular glass? Thrift stores, antique stores, auctions, eBay. Where I'm at, it's mostly 50/50 as to whether the seller knows or not. That also influences the price -- I've gotten pieces for under a dollar because someone just thought it was their grandma's green glass.
  
imgur.com
I don't know much about it, it's the only piece I've got that is made from two distinct layers of glass.
If I position my Geiger counter in the perfect position, I can get a reading in the range of 1.5 - 2.2 μSv/h  If I move the Geiger counter even a few centimeters away, or even position it at a less-optimal position, the reading returns to background levels.  For reference, the average value of exposure while flying inside of an airplane is 3 μSv/h. So even if you place one of my cups right next to your head you are likely being exposed less than while flying in an airplane. Not that I recommend doing this!
Additional Photos:      Camera: Canon 2000D Lens: Canon EF 50mm 1.8 / EFS 18-55mm ISO: 100 - Aperture: Various - WB: 5200k Exposure: 5 Shot HDR - RAW Lighting: 4 x 10 watt - 365nm UV LED
