![]() ![]() During synthesis zirconium oxide naturally forms monoclinic crystals, which are stable form under normal atmospheric conditions. Its main competitor as a synthetic gemstone is a more recently cultivated material, synthetic moissanite.Ĭubic zirconia is crystallographically isometric, an important attribute of a would-be diamond simulant. It is sometimes erroneously called cubic zirconium.īecause of its low cost, durability, and close visual likeness to diamond, synthetic cubic zirconia has remained the most gemologically and economically important competitor for diamonds since commercial production began in 1976. It should not be confused with zircon, which is a zirconium silicate (ZrSiO 4). The synthesized material is hard and usually colorless, but may be made in a variety of different colors. Cubic zirconia (abbreviated CZ) is the cubic crystalline form of zirconium dioxide (ZrO 2). ![]()
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