Well, not only Uranium, just a tad. Uranium glass (AKA Vaseline glass) has small amounts of Uranium Dioxide mixed in which makes the glass glow bright green when exposed to UV light.

Vaseline Glass was primarily made from 1840, up to just before WWII, and then was continued from 1959 to the present. The government confiscated all supplies of uranium during WWII and halted all production of Vaseline Glass from approximately 1943 until the ban was lifted in Nov. 1958. Only after years of testing by the various regulatory departments of the government were glass companies once again allowed to make this glass. In Victorian times, glassblowers who made Vaseline Glass usually died at a relatively young age of lung cancer, and the ‘stories’ have persisted for years that this was due to their exposure to molten Vaseline Glass. However, when this information was discussed with different experts on radiation (from University of Missouri and University of Oklahoma), they felt that there may have been other reasons for their early demise, as radiation tends to affect the thyroid glands the most. I guess this will also be a subject for long debate.

Due to the tight regulations on Uranium Dioxide and the expense of this ingredient, only very limited quantities are being produced today. Due to this, most collectors are aware of the limited nature of its’ production and this is reflected in the marketplace.

Source: www.vaselineglass.org/?page_id=35