Vaseline Glass earned that name from the trademark yellow or yellow green color of the glass.
Developed around 1830, it was then known as canary glass, crafted by blowing glass dosed with small amounts of uranium dioxide. Franz Riedel, an Austrian artisan, first realized that adding the chemical produced a clear, lovely transparent yellow and a green - yellow here. Victorian bowls, candlesticks, plates were produced by French manufacturers such as Baccarat, American Stellar glass.
Around 1920, with the onset of the cold war, uranium was strictly limited.
"True" vaseline glass can be identified by shining a black light through it - it glows in a vivid "otherworldly" light.