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.
Zirconia (Zirconium Oxide) is a white powdered metal used to create dental frameworks for crowns, bridges and other dental substructures. It replaces gold or stainless steel used in the past, creates the appearance of a whiter more translucent tooth, and is transparent in xrays.hey are a much better choice than metal for front teeth, but because they are more fragile than metal or zirconia substrates, all-porcelain is not a good material for anterior teeth or large bridges which might be subject to more pressure.