Are Lab Grown Diamonds Cubic Zirconia?

One of the most common questions clients ask during their personalized consultation at Acredo is:

“Are lab grown diamonds cubic zirconia?”

The simple answer is no. They only look similar at first glance.

Lab grown diamonds and cubic zirconia are completely different materials with different optical, physical, and chemical properties.

Below is a clear breakdown so you can choose the right stone for your custom-designed jewelry.

Lab Grown Diamonds vs. Cubic Zirconia: The Short Answer

Lab grown diamonds are real diamonds.

They have the same chemical structure (pure carbon), the same hardness (10 on the Mohs scale), and the same brilliance as natural diamonds.

Cubic zirconia (CZ) is a diamond simulant.

It is made from zirconium oxide, softer, more affordable, and visually different under close inspection.

Design Insight:

If you want the beauty, durability, and long-term value of a diamond — with ethical sourcing — a lab grown diamond is the correct choice. CZ is only intended for temporary or fashion jewelry.

Key Differences at a Glance

1. Composition

• Lab Grown Diamond: Carbon crystal, identical to natural diamonds

• CZ: Zirconium oxide, not related to carbon

2. Hardness & Durability

• Lab Diamond: Extremely durable, ideal for engagement rings

• CZ: Softer (8–8.5 Mohs), scratches more easily

3. Brilliance & Fire

• Lab Diamond: Crisp, sharp scintillation

• CZ: High dispersion, glossier “rainbow” sparkle that looks different from diamond fire

4. Longevity

• Lab Diamond: Lifetime durability

• CZ: Can cloud, scratch, and lose luster over time

5. Price

• Lab Diamond: More affordable than natural, but still a luxury gemstone

• CZ: Very inexpensive, meant for fashion pieces

Diamonds vs. Cubic Zirconia Comparison Chart

Are Lab Grown Diamonds “Fake” Diamonds?

No.

They are chemically and visually identical to natural diamonds, simply grown in a modern, controlled environment rather than mined. They receive the same grading (cut, color, clarity, carat) and can be certified just like natural diamonds.

Gem Fact:

Lab grown diamonds form under the same type of conditions as natural diamonds — high pressure and high temperature — just in a laboratory.

Is Cubic Zirconia Ever Used in Fine Jewelry?

Typically no.

Cubic zirconia is widely used in fashion jewelry or temporary pieces but is not considered suitable for heirloom-quality or handcrafted jewelry.

Acredo does not use CZ for diamond engagement rings, wedding pieces, or fine custom designs.

What Couples Also Ask

Is Moissanite the Same as Cubic Zirconia?

No — moissanite is another diamond simulant, but more durable than CZ.

Can Lab Grown Diamonds Be Customized at Acredo?

Yes. They’re excellent for custom-designed jewelry, engraved bands, and unique settings.

Do Lab Grown Diamonds Hold Their Beauty Over Time?

Absolutely — they maintain brilliance just like natural diamonds.

Why Choose Lab Grown Diamonds for Acredo Designs?

Lab grown diamonds offer:

• Real diamond beauty

• Excellent durability

• Ethical sourcing

• A more accessible price point

• Freedom to explore bolder or more intricate handcrafted designs

They allow you to invest more in personalization, metalwork, engraving, or unique gemstone combinations — hallmarks of Acredo’s artistry.

Conclusion: Lab Grown Diamonds Are Real — Cubic Zirconia Is Not

If you want a stone worthy of a handcrafted Acredo design, a lab grown diamond is the correct choice. It offers authenticity, brilliance, durability, and alignment with Acredo’s values of ethical sourcing and craftsmanship.

Cubic zirconia, while pretty, is not a substitute for diamond quality.

• Design your perfect ring.

• Explore our customization options.

• Experience a personalized consultation at Acredo.