10k gold rare blue sapphire uranium glass ring made by Ostby Barton. Glows green under a blacklight indicating the presence of uranium in the glass. The green glow is a bit subdued due to the dark color of the glass, however, it does glow the telltale green of uranium and tests as such. This is not a fluorescent gemstone - it tests as glass as well as a low level of radiation. The ring is marked "OB 10K" and is a size 6.75.Ostby Barton jewelry is extremely collectible, being one of the most admired American jewelry makers of the art deco period. Englebert Ostby died on the Titanic. The company continued to make jewelry into the 1960s. This is a fabulous example of one of their deco rings.
OB is one of only a handful of jewelry makers who used uranium glass in their gold rings. This one is particularly fine as the sapphire blue color is rare to find in uranium glass.Feel free to check out my other uranium glass jewelry items for sale. I also do custom commissions with a specialty in sterling silver rings so don't hesitate to contact me if you are looking for something specific! I also do restorations on vintage and antique gold rings with uranium glass.
If you are interested in such a ring you may message me. Uranium glass is glass made with up to 2% uranium dioxide for color. The uranium content causes the glass to fluoresce bright green under a UV blacklight.
It is very slightly radioactive and will register on a Geiger counter. Most jewelry pieces will register just above background radiation, enough to show true uranium content yet safety for wearing. The uranium glass in jewelry is the same glass found in the depression-era glassware that is popular with collectors. Uranium glass is identified with a UV blacklight, and it's only uranium glass if the item is truly glass, not another material, and glows the telltale bright neon green.
If a piece of glass fluoresces bright green then it contains uranium. No other material or element in glass has that effect.Other jewelry materials such as resin, plasic, enamel, paint, acrylic, some gemstones, and even adhesive under a rhinestone can glow like uranium, so it is imperative for a collector of such glass in jewelry to make sure the glowing item is truly glass. Sometimes an item can glow a dull green rather than bright neon, and that is due to manganese rather than uranium.
I treasure hunt all over the world for vintage uranium glass pieces to use in jewelry, as well as new pieces from Czech Republic. I specialize in sourcing old art deco jewelry components and faceted stones. I also very much enjoy finding vintage uranium glass jewelry pieces.
All of my own pieces are made with the greatest care and love and have a lifetime guarantee for repair. I test all glowing items in both my own pieces and in vintage pieces with a pin scratch test, a presidium tester, and a Geiger counter to ensure that all of my items are true uranium glass. The item "10k Ostby Barton Blue Uranium Glass Ring Rare Sapphire Color Art Deco Size 6.75" is in sale since Sunday, November 7, 2021. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Rings".The seller is "songbirdsweet1" and is located in Longmont, Colorado. This item can be shipped worldwide.