Uranium was discovered by Martin Klaproth in 1789. He named this new found discovery after Uranus, in honor of the planet’s discovery in 1781. Uranium’s primary use dates back to 79 CE where it was used to add the color yellow to ceramic glazes. During the Middle Ages, pitchblende (uranium oxide) was mined from the Habsburg silver mines in the Czech Republic and was used to color glass. Uranium glassware, also called Vaseline glass, was commercially manufactured starting in the mid-19th century and was very popular through the 1920’s. Quality Victorian era and pre-war uranium glass pieces are highly collectible.