What is the Difference Between Lab-Grown Diamonds and Cubic Zirconia?
Sometimes two stones look almost the same, yet they are completely different once you learn what they’re made of. Lab-grown diamonds and cubic zirconia (CZ) often confuse buyers because both sparkle beautifully, but only one keeps its shine for a lifetime. This article explains the difference simply.
Key Takeaways
| Feature | Lab-Grown Diamond | Cubic Zirconia (CZ) |
|---|---|---|
| Real or Not | Real diamond grown in a lab | Man-made crystal |
| Material | Carbon | Zirconium oxide |
| Sparkle | Bright white, sharp | Rainbow-like, colorful |
| Durability | Lasts forever | Can become cloudy |
| Price | Higher | Very affordable |
| Also Called | Lab-grown diamonds name | Zirconia diamond, American diamond |
What Is a Lab-Grown Diamond?
A lab-grown diamond is a real diamond made of pure carbon. Instead of growing underground, it forms inside a lab using high heat and pressure. It looks exactly like a natural diamond and has the same hardness, sparkle, and strength. Many people search online to understand whether these stones are real, asking things like “What is a lab-grown diamond,” “real diamonds vs. lab-grown,” or “artificial diamond vs. natural diamond.” The truth is simple: lab-grown diamonds are real diamonds, not imitations, not American diamonds, and not zirconia. They are durable enough for lifelong use and perfect for engagement rings or fine jewellery.
What Is Cubic Zirconia (CZ)?
Cubic zirconia, often called CZ, American diamond, or zirconia diamond, is a man-made crystal created to look like a diamond. It is made from zirconium oxide and has a very bright sparkle that can sometimes appear too colorful. Many people learn about CZ when searching “what are CZ stones,” “cubic zirconia meaning,” or “what are cubic zirconia stones.” CZ is popular because it is very affordable and easy to shape into large, eye-catching stones. However, because it is softer than diamond, it can scratch and turn cloudy over time, especially when worn daily.
Main Differences Between Lab-Grown Diamonds and Cubic Zirconia
The biggest difference between the two stones comes from what they are made of. Lab-grown diamonds are pure carbon, making them identical to natural diamonds. Cubic zirconia, on the other hand, is made from zirconium oxide, which is why the difference between zirconia and diamond is so noticeable over time.
Diamonds have a sharp white sparkle, while CZ often produces rainbow flashes. Diamonds also rank 10 on the Mohs hardness scale, making them the hardest natural material. CZ ranks around 8–8.5, meaning it can scratch and lose its shine. When it comes to price, CZ is much cheaper, which makes it popular for budget jewellery. Lab-grown diamonds cost more, but they hold their shine forever and offer much better long-term value.
Price Comparison
| Stone | Typical Price | Notes |
|---|---|---|
| Lab-Grown Diamond | Higher | Still more affordable than natural diamonds |
| CZ Diamond Price | Very low | Best for budget-friendly jewellery |
Lab-grown diamonds are often chosen for engagement rings, wedding rings, and lifelong jewellery. CZ is usually used for party wear, casual jewellery, and trendy pieces where the buyer wants a big stone for a small price.
Zircon, American Diamond, CZ & Diamond Simple Explanation
People often confuse zircon, American diamond, and cubic zirconia, especially in India. American diamond is just another name for CZ. Zircon is a natural gemstone. Neither of them is a real diamond. Lab-grown diamonds and natural diamonds are the only real diamonds.
| Name | What It Really Is | A Real Diamond? |
|---|---|---|
| CZ / American Diamond | Man-made crystal | No |
| Zircon | Natural gemstone | No |
| Lab-Grown Diamond | Real diamond | Yes |
| Natural Diamond | Real diamond | Yes |
Why Lab-Grown Diamonds Are Better Than Cubic Zirconia
Lab-grown diamonds look more natural because their sparkle is crisp and white, unlike the rainbow flashes of CZ. They stay bright forever, while CZ becomes cloudy with daily use. Diamonds are much stronger, so they do not scratch easily. They also hold better value. That’s why people comparing cubic zirconia vs. diamond rings usually choose lab-grown diamonds for anything meaningful or long-term, such as engagement rings or anniversary gifts.
When Cubic Zirconia Is a Good Choice
Cubic zirconia is still a great option when the goal is saving money while getting a stylish look. It works well for fashion jewellery, large statement pieces, and party wear. Since it is inexpensive, people enjoy buying several designs without worrying about price. However, CZ is not ideal for jewellery meant to last many years.
Another Comparison Table: Lab-Grown Diamond vs CZ
| Category | Lab-Grown Diamond | Cubic Zirconia |
|---|---|---|
| Composition | Carbon | Zirconium oxide |
| Sparkle | Natural white light | Rainbow-like |
| Clouding | Never clouds | Can turn cloudy quickly |
| Resale Value | Good | Very low |
| Long-Term Durability | Excellent | Moderate |
| Appearance | Looks exactly like diamond | Looks similar but slightly different |
FAQs
1. Is cubic zirconia a real diamond?
No. It is a man-made crystal, not a diamond.
2. Do lab-grown diamonds look like real diamonds?
Yes. They are real diamonds and look identical to natural ones.
3. Does cubic zirconia fade or become cloudy?
Yes. CZ can lose its shine and turn cloudy after months of regular wear.
4. Is zircon the same as cubic zirconia?
No. Zircon is a natural gemstone. CZ is a man-made crystal.
5. Which is better for rings, CZ or lab-grown diamonds?
Lab-grown diamonds are better for rings because they last forever and do not cloud.
6. Is American diamond real?
No. American diamond is simply another name for cubic zirconia.
7. Are lab-grown diamonds good for engagement rings?
Yes. They are durable, beautiful, and long-lasting.
