Moissanite vs Cubic Zirconia

Quick answer: Moissanite and cubic zirconia (CZ) are both lab-made diamond alternatives, but they are very different in quality. Moissanite is much harder (about 9.25 vs 8 to 8.5 on the Mohs scale), far more brilliant, and keeps its sparkle for a lifetime. CZ is inexpensive but scratches, clouds and loses its sharp look over time. For fine jewelry and engagement rings, moissanite is the durable, long-term choice; CZ suits costume or short-term fashion jewelry.

Because both are used as diamond alternatives, shoppers often confuse them. Here is how they really compare.

Moissanite vs Cubic Zirconia at a Glance

Why Durability Matters

Everyday dust contains quartz, which is about 7 on the Mohs scale. Over time, softer stones like CZ get tiny scratches that dull their facets. Moissanite's hardness means its edges stay crisp and its sparkle stays bright for decades.

Shown: Interlocking Oval Mixed Moissanite Cluster Necklace

How to Tell Them Apart

• Sparkle: moissanite shows stronger brilliance and fire.
• Wear: older CZ often shows scratches and rounded facet edges.
• Weight: CZ is heavier than moissanite of the same size.
• Testing: CZ fails thermal diamond testers; moissanite often passes them.

Which Should You Choose?

• Engagement rings and heirlooms: moissanite or lab grown diamond.
• Everyday fine jewelry: moissanite for lasting sparkle.
• Trend pieces or costume jewelry: CZ can be fine for short-term wear.

Moissanite at Ivevar

We use moissanite, never CZ, in our fine jewelry, handcrafted in our Surat workshop in solid settings. Every piece ships free worldwide, with 30-day easy returns. Browse moissanite necklaces and moissanite fine jewelry.

Shop Moissanite Necklaces

Interlocking Oval NecklaceShop NowGeometric Fringe NecklaceShop NowInfinity Bar NecklaceShop NowCurved Wave Bar NecklaceShop NowChevron Pear Drop NecklaceShop NowLayered Emerald Y NecklaceShop Now

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Frequently Asked Questions

Is moissanite better than cubic zirconia?

For fine jewelry, yes: it is harder, more brilliant and lasts far longer.

Does CZ get cloudy?

Over time it can scratch and look dull.

Is moissanite more expensive than CZ?

Yes, but it is still affordable compared with diamond.

Can CZ pass a diamond tester?

No. CZ fails thermal diamond testers.

Is CZ good for engagement rings?

It is not recommended for rings meant to last a lifetime.

The Bottom Line

Cubic zirconia is a budget fashion stone; moissanite is a durable fine jewelry gemstone that keeps its sparkle for life.

Related Guides

• Moissanite vs natural diamond
• Does moissanite get cloudy?
• All about moissanite

Author Bio

Aumsri Pradhan

Founder, Ivevar Luxury

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Aumsri Pradhan is the founder of Ivevar Luxury, a Surat-based fine jewelry brand that designs and handcrafts lab grown diamond and moissanite jewelry in its own workshop. She leads the brand's design and customer experience, from engagement rings and bridal sets to custom pieces made to each client's story. Through the Ivevar blog, she shares practical guidance on lab grown diamonds, moissanite, diamond grading and ring design to help buyers choose with confidence.

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