Another technique first applied to quartz and topaz has also been adapted to cubic zirconia: An iridescent effect created by vacuum-sputtering onto finished stones an extremely thin layer of a precious metal (typically gold), or certain metal oxides, metal nitrides, or other coatings. This material is marketed as "mystic" by many dealers. Unlike diamond-like carbon and other hard synthetic ceramic coatings, the iridescent effect made with precious metal coatings is not durable, due to their extremely low hardness and poor abrasion wear properties, compared to the remarkably durable cubic zirconia substrate.
another technique first applied to quartz and topaz has also been adapted to cubic zirconia an iridescent effect created by vacuum-sputtering onto finished stones an extremely thin layer of a precious metal (typically gold) or certain metal oxides metal nitrides or other coatings this material is marketed as "mystic" by many dealers unlike diamond-like carbon and other hard synthetic ceramic coatings the iridescent effect made with precious metal coatings is not durable due to their extremely low hardness and poor abrasion wear properties compared to the remarkably durable cubic zirconia substrate