Lab Diamonds vs Moissanite vs Cubic Zirconia: Which One Should You Choose?
When shopping for a sparkling stone, many buyers ask: Should I choose a lab diamond, moissanite, or cubic zirconia? At first glance, all three can look stunning, but they are not the same. Each has unique qualities in terms of brilliance, durability, and value. Understanding the differences is key to making the right choice for your lifestyle and budget.
In this guide, we’ll compare lab grown vs moissanite, explore moissanite vs diamond, and explain the truth about cubic zirconia vs lab grown options.
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What Are Lab-Grown Diamonds?
Lab-grown diamonds are real diamonds created in a controlled laboratory environment using advanced methods such as CVD and HPHT.
- Composition: Pure carbon, identical to mined diamonds.
- Durability: 10/10 on the Mohs hardness scale.
- Appearance: Brilliant sparkle, identical to natural diamonds.
- Value: Affordable and retain value better than simulants.
What Is Moissanite?
Moissanite was discovered in a meteor crater and is now created in labs.
- Composition: Silicon carbide.
- Durability: 9.25/10 on the Mohs scale.
- Appearance: Extra colorful sparkle (“fire”).
- Value: Less expensive than diamonds, but not the same.
What Is Cubic Zirconia?
Cubic zirconia (CZ) has been a diamond alternative since the 1970s.
- Composition: Zirconium dioxide.
- Durability: 8–8.5/10 on the Mohs scale.
- Appearance: Sparkly at first but clouds over time.
- Value: Very cheap, no resale value.
Key Differences
| Feature | Lab-Grown Diamond | Moissanite | Cubic Zirconia |
|---|---|---|---|
| Material | Pure carbon | Silicon carbide | Zirconium dioxide |
| Hardness (Mohs) | 10 | 9.25 | 8–8.5 |
| Sparkle | Classic brilliance | Rainbow fire | Bright, less natural |
| Durability | Forever | Very long-lasting | Scratches & clouds |
| Price | $$ | $ | Very cheap |
| Resale Value | Moderate | Low | None |