If you’ve ever admired the sparkle of a diamond but found the price tag out of reach, you’ve likely encountered cubic zirconia jewelry. But what exactly is it, and why has it become one of the most popular diamond alternatives in the world?
This guide answers the question “what is cubic zirconia jewelry?” and explains everything you need to know about this brilliant, affordable gemstone.
What Is Cubic Zirconia?
Cubic zirconia (often abbreviated as CZ) is a synthetic gemstone made from zirconium dioxide (ZrO₂). It is created in laboratories through a controlled heating process that results in flawless, highly reflective crystals. The “cubic” part of its name refers to its cubic crystalline structure, which is the same crystal system as diamond—making it an excellent diamond lookalike.
While zirconium dioxide does exist in nature, it is extremely rare and unsuitable for jewelry use, so all cubic zirconia used in jewelry is lab-created. This manufacturing process ensures fewer flaws and inclusions, which lends itself to bright and glittering gems.
For more detailed scientific information on cubic zirconia’s properties, you can explore the Gemological Institute of America’s (GIA) glossary of gemstone terms.
A Brief History of Cubic Zirconia
The story of cubic zirconia began in 1892 when scientists first came across it in nature, but they had no practical use for it at the time. It wasn’t until the 1930s that German mineralogists rediscovered the naturally occurring cubic form of zirconium oxide.
The breakthrough came in the 1970s, when Soviet scientists perfected a method for growing cubic zirconia stones in a lab while searching for new materials for lasers and optical applications. After this discovery, cubic zirconia instantly became popular as a diamond substitute and has graced engagement rings, earrings, necklaces, and bracelets ever since.
Key Characteristics of Cubic Zirconia Jewelry
When exploring what cubic zirconia jewelry is, it’s helpful to understand its defining properties:
Appearance and Brilliance
Cubic zirconia closely resembles a diamond in appearance. To the untrained eye, it can be difficult to distinguish between the two. However, there are notable differences:
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Brilliance and Fire: Cubic zirconia has a higher dispersion rate than diamonds, meaning it displays more “fire”—colorful rainbow flashes of light. Diamonds, on the other hand, have a unique brilliance that is harder to replicate.
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Color: Most cubic zirconia is colorless, comparable to a “D” grade on a diamond’s color grading scale—the highest possible rating. However, CZ can also be manufactured in a wide array of colors, including pink, blue, yellow, and green, by adding different metal oxides during production.
Clarity
Since cubic zirconia is lab-created, it is usually free from inclusions or blemishes, making it virtually flawless. By contrast, most natural diamonds have some sort of defect, such as a feather, included crystal, or other imperfection.
Durability
Cubic zirconia ranks approximately 8 to 8.5 on the Mohs hardness scale. While this is still quite hard and durable, it is significantly softer than a diamond, which ranks 10—the hardest known natural material. This means CZ is more prone to scratching, chipping, and cloudiness over time, especially with daily wear.
The International Gem Society offers additional resources on gemstone hardness and durability for those interested in learning more.
Weight
Cubic zirconia is noticeably heavier than a diamond of the same size. It weighs about 1.7 to 1.75 times more than a diamond, giving it a denser, weightier feel in jewelry.
Cost
One of the most significant advantages of cubic zirconia jewelry is its affordability. While a one-carat diamond can cost thousands to tens of thousands of dollars, cubic zirconia of comparable size might cost less than $50. This makes CZ an accessible option for virtually any budget.
Types of Cubic Zirconia Jewelry
Cubic zirconia jewelry comes in virtually every style and setting imaginable. Common pieces include:
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Cincin (including engagement rings and wedding bands)
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Anting-anting
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Necklaces and pendants
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Bracelets and bangles
CZ stones can be cut into any shape, including round brilliant, princess, oval, pear, and cushion cuts. They are typically set in various metals, including sterling silver, stainless steel, gold, and platinum. Sterling silver and stainless steel are often recommended because they offer good durability at a reasonable price point without the issues of plating wear found in cheaper options.
Caring for Your Cubic Zirconia Jewelry
To keep your cubic zirconia jewelry looking its best:
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Clean regularly with mild soap, warm water, and a soft brush. Rinse thoroughly and dry with a soft cloth.
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Avoid harsh chemicals like chlorine, bleach, and household cleaners, as they can damage the stone’s surface.
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Store separately in a soft pouch or lined jewelry box to prevent scratches.
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Limit exposure to heat and direct sunlight.
For a complete guide on maintenance, read our article on how to properly clean and care for cubic zirconia jewelry.
Why Choose Cubic Zirconia Jewelry?
There are many reasons why cubic zirconia jewelry remains a popular choice:
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Affordability: Enjoy high-quality, elegant jewelry at a fraction of the cost of diamonds .
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Variety: Available in every color of the rainbow, CZ offers endless styling possibilities .
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Ethical sourcing: Lab-created CZ eliminates concerns about unethical mining practices and environmental impact .
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Perfect for travel: CZ makes an excellent “stunt double” for diamonds when you want to leave valuable jewelry safely at home .





