Zirconium dioxide jewellery. Like diamond, cubic zirconia has a cubic crystal structure and a high index of refraction. Visually discerning a good quality cubic zirconia gem from a diamond is difficult, and most jewellers will have a thermal conductivity tester to identify cubic zirconia by its low thermal conductivity (diamond is a very good thermal conductor). This state of zirconia is commonly called "cubic zirconia", "CZ", or "zircon" by jewellers, but the last name is not chemically accurate. Zircon is actually the mineral name for naturally occurring zirconium silicate (ZrSiO). Zirconium dioxide Zirconium dioxide (), sometimes known as zirconia (not to be
Crystal Head Vodka type of study. Crystal Head does not use any additives--glycerol, citrus oil, or sugar—in the production of their vodka. The factory and product is certified kosher, as well as gluten-free. Crystal Head Vodka Crystal Head Vodka is a brand of vodka manufactured by Globefill Inc. in Newfoundland and Labrador, Canada. It was conceived and founded by actor Dan Aykroyd and artist John Alexander in 2007. The vodka is quadruple-distilled and seven times filtered, with the final 3 filtrations through Herkimer diamond crystals, which are actually a type of double-terminated quartz rather than diamond. The Crystal Skull bottle was designed by