Definition of COMMODITY RATE. : a common carrier rate distinguished from a class rate and applicable only to a specific commodity or group of related commodities carried between specific points or territories. ADVERTISEMENT. a common carrier rate distinguished from a class rate and applicable only to a specific commodity or group of related commodities carried between specific points or territories.
Cubic Zirconia. Cubic zirconia (CZ), a diamond simulant, is not only the oldest diamond substitute, but also the most popular. Composed of zirconium oxide (ZrO 2) the mineral is extremely rare in natural form. Discovered by German mineralogists in 1937, zirconium wasnât considered economically feasible.ubic zirconia possesses less brilliance (less sparkle), but has more fire (flashes of rainbow color.) CZ is also very hard, not quite as hard as a diamond, but like a diamond can scratch glass.
Shine bright like a diamond in the best possible way with high quality cubic zirconia. You're here for a reason and that's to save on jewelry.Diamonds are expensive and not everyone can afford to splurge on jewelry especially when there are so many other things us women get caught up in.Z is about 75% heavier than diamond. As such, a CZ's size is referred to in carats only as in comparison to diamonds. CZs are more accurately measured in millimeters, referring to the diameter. (A 6.5 mm cubic zirconia is equal in size to a one-carat diamond and actually weighs about 1.75 carats.).