Fenton Hobnail Vaseline Glass Vase Under UV Light

Fenton: First started making vaseline glass in 1930’s. Hobnail pattern started in 1941.
Fenton Art Glass was well-known for its glass-working techniques and the many colors it produced, some of which used uranium 238, which is radioactive. Fenton Art Glass had to be licensed through the United States Nuclear Regulatory Commission to use the radioactive material. If you expose vaseline glass to UV light and it glows green, then it contains uranium.