When shopping for sparkling jewelry, two gemstones often appear side by side: moissanite and cubic zirconia (CZ). Both are popular alternatives to diamonds and offer beautiful brilliance at a much more accessible price. However, many shoppers wonder how to tell the difference between the two.

While moissanite and cubic zirconia may look similar at first glance, they are very different gemstones with distinct properties. Understanding these differences can help you choose the right jewelry for your lifestyle, budget, and long-term wear.

In this guide, we’ll explain the key ways to tell whether a stone is moissanite or cubic zirconia, along with tips to help you identify them when shopping for jewelry.

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What Is Moissanite?

Moissanite is a rare gemstone originally discovered in meteorite fragments. Today, it is lab-created, making it an ethical and sustainable option for fine jewelry.

Moissanite is known for:

• Exceptional brilliance

• Fire that exceeds diamonds

• Extreme durability

• Long-lasting clarity

With a hardness of 9.25 on the Mohs scale, moissanite is one of the hardest gemstones used in jewelry, making it ideal for everyday wear.

If you'd like to learn more about this gemstone, read our complete moissanite guide.

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What Is Cubic Zirconia?

Cubic zirconia, often called CZ, is a man-made gemstone designed to resemble diamonds. It has been widely used in jewelry for decades due to its affordability and attractive sparkle.

Cubic zirconia offers:

• High brilliance

• Affordable pricing

• Clear diamond-like appearance

• Versatile jewelry designs

Although CZ is durable, it is softer than moissanite and may show wear after extended use.

Learn more in our complete cubic zirconia guide.

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Key Differences Between Moissanite and Cubic Zirconia

Both gemstones are beautiful, but moissanite is generally considered the premium option due to its durability and brilliance.

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How to Tell if a Stone Is Moissanite or Cubic Zirconia

While it can be difficult to identify the difference with the naked eye, there are several ways to distinguish these stones.

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1. Look at the Sparkle

One of the easiest ways to tell the difference is by observing how the stone reflects light.

Moissanite produces intense rainbow flashes, known as fire. When exposed to bright lighting, the stone often displays colorful reflections.

Cubic zirconia tends to produce more white light sparkle, similar to diamonds but typically less vibrant than moissanite.

If you notice strong rainbow flashes, the stone is likely moissanite.

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2. Check the Weight

Cubic zirconia is denser than moissanite, meaning it weighs slightly more for the same size stone.

If two stones look identical in size but one feels noticeably heavier, it may be cubic zirconia.

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3. Examine the Clarity Over Time

Moissanite is highly resistant to scratching and clouding. Over many years of wear, it typically maintains its brilliance.

Cubic zirconia, while durable, can sometimes become slightly cloudy or scratched after extended use.

If a stone has lost some sparkle after years of wear, it may be CZ.

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4. Look at the Price

Price can also be a strong indicator.

Moissanite is generally more expensive than cubic zirconia, although still significantly more affordable than diamonds.

If a large stone is priced extremely low, it is more likely cubic zirconia.

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5. Professional Testing

Jewelry professionals can easily identify the difference using specialized equipment.

Tools used include:

• Diamond testers

• Thermal conductivity testers

• Professional gemological inspection

If you are unsure about a gemstone, a jeweler can confirm the stone type within seconds.

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Which Is Better: Moissanite or Cubic Zirconia?

The answer depends on what you value most in jewelry.

Choose Moissanite if you want:

• Maximum brilliance

• Long-term durability

• A premium gemstone alternative to diamonds

Choose Cubic Zirconia if you want:

• Affordable sparkle

• Fashion jewelry

• Large stones at lower prices

Both stones can create stunning jewelry pieces, especially when crafted in high-quality settings.

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Shop Dloria Jewelry

At Dloria, we design jewelry that combines elegance, brilliance, and everyday wearability.

Explore our collections:

• Moissanite Jewelry

• Cubic Zirconia Jewelry

• Tennis Bracelets

• Inspirational Bracelets

Each piece is crafted to deliver timeless beauty and exceptional sparkle.

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FAQs

Can you tell moissanite and cubic zirconia apart visually?

In some lighting conditions, yes. Moissanite typically displays stronger rainbow flashes than cubic zirconia.

Does cubic zirconia look fake?

High-quality cubic zirconia can look extremely similar to diamonds, especially when set in well-crafted jewelry.

Does moissanite last forever?

Yes. Moissanite is extremely durable and can maintain its brilliance for a lifetime with proper care.

Is moissanite better than cubic zirconia?

Moissanite is harder and more durable, making it a better choice for long-term jewelry such as engagement rings or everyday pieces.

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Final Thoughts

Both moissanite and cubic zirconia offer beautiful alternatives to traditional diamonds. Understanding their differences can help you make an informed decision when purchasing jewelry.

Moissanite stands out for its durability and intense sparkle, while cubic zirconia remains a popular choice for affordable brilliance.

No matter which gemstone you choose, the right jewelry piece should reflect your personal style and bring lasting enjoyment.