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
What Comes Naturally with chart success. What Comes Naturally What Comes Naturally is the tenth studio album by Scottish-born singer Sheena Easton, released in 1991 through MCA Records. This album includes Easton’s final American Top 40 hit to date, "What Comes Naturally", which remained on the pop chart for 10 weeks. Other singles released were "You Can Swing It" and "To Anyone", both which failed to chart. The album charted in the United States at number 90. Easton is the co-writer on three tracks on the album. Easton is one of the few white artists to adopt the new jack swing sound from