What's wrong with cubic zirconia?
Mia Phillips
Updated on April 22, 2026
Because cubic zirconia is made in a lab, it lacks the natural imperfections that diamonds have. A flawless diamond is incredibly rare and, thus, incredibly expensive. While some may regard cubic zirconia as flawless, they're usually considered “too perfect” or fake-looking.
Why is cubic zirconia cheap?
Cubic zirconia is very inexpensive, since it's synthetic and mass-produced. A cut and polished one carat cubic zirconia stone will cost $20 and a similar two carat stone will cost about $30. This is far cheaper than diamonds, which start at $1800 for one carat and increase considerably as size goes up.Is cubic zirconia ethical?
Not quite as hard or sparkly as a genuine diamond, but nearly indistinguishable to the untrained eye, cubic zirconia offers an ethical and affordable choice for those who would like something different. This is one of the least expensive options as well.Is cubic zirconia jewelry tacky?
A cubic zirconia ring can look tacky if it's an extremely large stone masquerading as a diamond. For example, if someone you know is wearing a large diamond-looking stone and yet you know that they couldn't afford a real diamond of that size, you'd straightaway assume that it's a fake.Why cubic zirconia is a better choice?
The Cubic Zirconia has a hardness rating of 8.5 on the Mohs scale, a dispersion rate of 0.058-0.066, a density of 5.50-5.90 and a refractive index of 2.08-2.176. These features has made the Cubic Zirconia the perfect gemstone that be used for Cubic Zirconia engagement rings.The Story of Cubic Zirconia: Far More than just Fake Diamond
Will cubic zirconia pass a diamond tester?
No. Cubic Zirconia (or CZ) does not have high enough thermal conductivity to pass. So, when you test a CZ with a diamond tester, it will not show as diamond. In fact, distinguishing CZ from diamond is one of the most important uses of thermal conductivity pen testers.Can you wear cubic zirconia in the shower?
Cubic zirconias look like real diamonds, but they're not. They lack the toughness and resistance of diamonds. It's strongly recommended that you take off your cubic zirconia jewelry before you step in the shower.Can the average person tell the difference between cubic zirconia and diamond?
You can easily tell the difference between the two if your measurements are correct and if you are using a standard scale. Another differentiating feature is that diamonds are the hardest substances found in the world. Their hardness is around 10 on the Mohs scale.Will cubic zirconia turn green?
Authentic Cubic Zirconia does not turn your skin green; however, a low-quality imitation might be because it has brass and copper inclusions. Some Cubic Zirconia has gold, silver, or rhodium plating on the bands, which means it tarnishes and makes skin green when the plating wears off.Do cubic zirconia lose their sparkle?
An accumulation of surface scratches will reduce a cubic zirconia's brilliant shine over time. Any chemical that comes into contact with CZ can cause it to look dull and lose its sparkle. Thankfully, there are some easy ways you can clean your jewelry to help restore it to its original condition.Are lab-grown diamonds better than cubic zirconia?
Man-made diamonds are substantially more durable than cubic zirconia. This is down to the difference in hardness between both stones. Synthetic diamonds are placed at 10 on the Mohs scale of hardness, while cubic zirconia has a rating of 8.5.What is the most eco friendly gemstone?
Here are our top 10 most ethical gemstones and their ethical sources.
- Canadian Ammolite. ...
- Sri Lankan Sapphires. ...
- Small-scale Amethysts. ...
- Sustainable Pearls. ...
- Muzo Emeralds. ...
- Brazilian Citrine. ...
- Californian Howlite. ...
- Australian Opals.
Does zirconia sparkle like diamond?
Does Cubic Zirconia Shine Like a Diamond? No, cubic zirconia does not shine with the same brilliance as a diamond. Diamonds shine with pure white light, while CZ diamonds give off rainbow colors. They are also more prone to becoming dull and scratched over time, and are thus not the best option for daily wear.Will a cubic zirconia sink in water?
Diamonds are dense and will sink quickly, while certain imitations will sink more slowly. If your gem doesn't immediately sink to the bottom, it's likely a glass or quartz imitation. However, other imitations, including cubic zirconia, will also sink quickly.Is cubic zirconia better than Swarovski crystal?
Simply put, Swarovski Zirconia is a better variant of Cubic Zirconia. It's also more expensive, however, as it bears the Swarovski brand and is of a higher quality.Is cubic zirconia good jewelry?
Although diamonds are largely considered timeless and many people treasure them, cubic zirconia is pretty serious competition. This gemstone is high quality, long lasting, and so much more affordable than diamonds. Here's everything you might want to know about cubic zirconia before buying a piece for yourself.Does cubic zirconia rust in water?
Cubic zirconia does not rust, but the jewelry setting can. Inexpensive metals such as brass, gold-plated alloys, and sterling silver often rust over time due to exposure to oxygen in the air and water.How do you make cubic zirconia sparkle?
Scrub your cubic zirconia with a soft-bristled toothbrush.You can dunk the jewelry briefly to get it wet. You can also simply apply your water/detergent mixture to your toothbrush. Gently scrub down your cubic zirconia with a soft-bristled toothbrush to remove dirt and debris and achieve a healthy shine.