Lab-Grown Diamond vs. Moissanite: Which Should You Choose?
If you're shopping for fine jewelry and wondering whether to go with a lab-grown diamond or a moissanite, you're not alone. Both are stunning, ethical alternatives to mined diamonds — but they're not the same stone. Here's everything you need to know.
What Is a Lab-Grown Diamond?
A lab-grown diamond is a real diamond — chemically, physically, and optically identical to a mined diamond. It's created in a controlled environment using either High Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD) methods. The result? The same hardness (10 on the Mohs scale), the same brilliance, and the same fire — at a fraction of the price of a mined stone.
What Is Moissanite?
Moissanite is a naturally occurring silicon carbide mineral, first discovered in a meteorite crater. Today, all jewelry-grade moissanite is lab-created. It scores 9.25 on the Mohs hardness scale and is known for its exceptional rainbow fire — often even more sparkly than a diamond under certain lighting.
Lab-Grown Diamond vs. Moissanite: Key Differences
| Feature | Lab-Grown Diamond | Moissanite |
|---|---|---|
| Hardness (Mohs) | 10 | 9.25 |
| Brilliance | High (white light) | Very high (rainbow fire) |
| Price (1ct equivalent) | $500–$2,000+ | $200–$600 |
| Resale value | Low–moderate | Very low |
| Ethical sourcing | ✅ Yes | ✅ Yes |
| Passes diamond tester | ✅ Yes | ⚠️ Sometimes |
Which Is Better for an Engagement Ring?
If you want a stone that is indistinguishable from a mined diamond and carries the prestige of the word "diamond," go with a lab-grown diamond. Our lab-grown diamond rings are set in solid 14K gold and certified for quality.
If you want maximum sparkle at a lower price point and love that rainbow flash, moissanite is an excellent choice — especially for statement pieces like pendants and bracelets.
Our Recommendations
Looking for a lab-grown diamond piece? Check out our 14K Yellow Gold Lab-Grown Diamond Line Bracelet — a timeless everyday piece in solid gold with genuine lab-grown diamonds.
For a bezel-set diamond look with clean, modern lines, our Éclat Bezel Diamond Bracelet is a customer favourite.
Prefer a pendant? The Élise Bezel Diamond Necklace (0.25 CT Natural Diamond) is one of our most elegant pieces — minimal, refined, and built to last.
Final Verdict
Lab-grown diamond = prestige, durability, diamond certification. Best for engagement rings and heirloom pieces.
Moissanite = maximum brilliance, lower price, great for fashion and statement jewelry.
Either way, both are ethical, beautiful, and far better value than mined diamonds. Browse our full fine jewelry collection to find your perfect piece.
Frequently Asked Questions
Q: Is moissanite a fake diamond?
A: No. Moissanite is its own gemstone — silicon carbide — not an imitation diamond. It simply looks similar and is often used as an alternative.
Q: Will a lab-grown diamond pass a diamond tester?
A: Yes. Lab-grown diamonds are real diamonds and will pass standard diamond testers.
Q: Which lasts longer, lab-grown diamond or moissanite?
A: Both are extremely durable. Diamonds (lab or mined) score 10 on the Mohs scale; moissanite scores 9.25. Both are suitable for everyday wear.
Q: Does Guerilla Jewelry sell lab-grown diamonds?
A: Yes! We offer a curated selection of solid gold jewelry set with certified lab-grown diamonds. Browse our collection here.
