Vaseline Glass Or Uranium Oxide Glass – Radioactive Glass That Glows in the Dark


Uranium oxide glass is glass which has had uranium, usually in oxide diuranate shape, introduced to a tumbler blend previous to melting. The share typically varies from hint levels to about 2% by using weight uranium, although a few 19th-century portions were made with up to 25% uranium

Uranium oxide glass become as soon as made into tableware and family gadgets, however fell out of widespread use whilst the provision of uranium to maximum industries was sharply curtailed during the Cold War. Most such gadgets are now considered antiques or retro-technology collectibles, although there was a minor revival in art glassware. Otherwise, modern-day uranium glass is now especially limited to small gadgets like beads or marbles as clinical or ornamental novelties.


The ordinary color of uranium oxide glass levels from yellow to green depending on the oxidation kingdom and concentration of the steel ions, despite the fact that this could be altered through the addition of other factors as glass colorants. Uranium glass additionally fluoresces brilliant green underneath ultraviolet mild and may sign up above background radiation on a sufficiently sensitive geiger counter, although maximum portions of uranium glass are taken into consideration to be harmless and only negligibly radioactive.

The maximum standard coloration of uranium glass is faded yellowish-green, which within the 1920s brought about the nickname vaseline glass based totally on a perceived resemblance to the advent of petroleum jelly as formulated and commercially offered at that point. Specialized collectors nonetheless define  rose gold frames glasses “vaseline glass” as transparent or semitransparent uranium glass in this unique colour.

“Vaseline glass” is now regularly used as a synonym for any uranium glass, in particular within the United States, however this usage isn’t always usual. The term is sometimes carelessly carried out to different varieties of glass primarily based on positive aspects in their superficial appearance in normal light, regardless of real uranium content which calls for a blacklight test to verify the characteristic green fluorescence.

In England and Australia, the term “vaseline glass” can be used to consult any sort of translucent glass. Even within the United States, the “vaseline” description is every so often applied to any kind of translucent glass with a greasy surface lustre.

Several different commonplace subtypes of uranium oxide glass have their personal nicknames: custard glass (opaque or semiopaque light yellow), jadite glass (opaque or semiopaque pale green; to begin with, the call turned into trademarked as “Jadite”, despite the fact that this is on occasion overcorrected in modern utilization to “jadeite”), and Depression glass (obvious or semitransparent light inexperienced).

However, like “vaseline”, the phrases “custard” and “jad(e)ite” are often applied on the basis of superficial look instead of uranium content material. Similarly, Depression glass is likewise a trendy description for any piece of glassware manufactured in the course of the Great Depression no matter appearance or formulation.


The use of uranium oxide glass dates back to as a minimum seventy nine AD, the date of a mosaic containing yellow glass with 1% uranium oxide located in a Roman villa on Cape Posillipo within the Bay of Naples, Italy by R. T. Gunther of the University of Oxford in 1912. Starting in the late Middle Ages, pitchblende become extracted from the Habsburg silver mines in Joachimsthal, Bohemia (now Jáchymov inside the Czech Republic) and changed into used as a coloring agent within the nearby glassmaking industry.


Uranium glass became popular in the mid 19th century, with its period of best popularity being from the 1880s to the 1920s. By the 1840s many different European glassworks commenced to provide uranium glass objects and evolved new kinds of uranium glass. The Baccarat glassworks of France created an opaque green uranium glass which they named chrysoprase from its similarity to that green form of chalcedony.

At the end of the 19th century, glassmakers found that uranium glass with certain mineral additions will be tempered at excessive temperatures, inducing various stages of microcrystallisation. This produced a range of an increasing number of opaque glasses from the conventional obvious yellow or yellow-inexperienced to an opaque white. During the Depression years, more iron oxide become introduced to the mixture to in shape famous choices for a greener glass. This material, technically a tumbler-ceramic, received the call “vaseline glass” because of its supposedly comparable appearance to petroleum jelly.