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Pure Cubic Zirconia Rings in Sterling Silver
Cubic zirconia rings offer the optical properties of diamond at a fraction of the cost. Our collection of 36,638 CZ rings features lab-created stones set in .925 sterling silver, with prices ranging from $6 to $6302. Cubic zirconia rates 8-8.5 on the Mohs hardness scale, making it durable for daily wear. Each stone is synthesized from zirconium dioxide powder heated to over 4,982°F, producing a crystal structure with a refractive index of 2.15-2.18—close to diamond's 2.42.
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Lab-Created CZ Stones With Diamond-Grade Brilliance
Cubic zirconia was first synthesized in 1976 as a diamond simulant, and the process has been refined over five decades. The stones in our rings are optically flawless because they form under controlled laboratory conditions rather than geological pressure. This means no inclusions, consistent color grades, and precise cuts that maximize light return. CZ disperses light at 0.058-0.066, which creates more fire—those rainbow flashes—than natural diamond. Our sterling silver settings use 92.5% pure silver alloyed with copper for structural integrity. The metal complements CZ's bright white appearance without the yellow undertones sometimes seen in lower-karat gold. We source our cubic zirconia from established laboratories that produce stones specifically graded for jewelry use, not industrial applications. SilverRush Style has shipped sterling silver jewelry with free US delivery since 2005. Browse our full CZ ring selection to find the cut, setting style, and stone size that fits your preferences.Is cubic zirconia a real gemstone?
Cubic zirconia is a real lab-created crystal made from zirconium dioxide. It is not a natural gemstone but a synthesized material with its own distinct properties, including an 8-8.5 Mohs hardness rating.
How does cubic zirconia compare to diamond?
CZ has a refractive index of 2.15-2.18 compared to diamond's 2.42, and higher dispersion at 0.058-0.066 versus diamond's 0.044. CZ weighs about 1.7 times more than diamond of the same size and rates lower on hardness (8-8.5 vs 10).
Will cubic zirconia scratch or cloud over time?
At 8-8.5 Mohs hardness, CZ resists scratching from most common materials. Surface cloudiness can occur from soap residue or lotions; regular cleaning with mild soap and water maintains clarity.
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