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
Ambo Mineral Water Ambo Mineral Water Ambo Mineral Water is a brand of naturally-carbonated bottled mineral water, sourced from the springs in Ambo Senkele, near the town of Ambo in central Ethiopia. It is a popular drink in Ethiopia, and has been described as the "oldest modern mineral water" and Ethiopia's "oldest mineral water bottler." It has been bottled since 1930. The company is owned by SABMiller PLC and SouthWest Development, and used to be a state-owned company. Ambo Mineral Water has been bottled since 1930. The last emperor of Ethiopia used to travel here to drink the water, which has been described