If you're engagement ring shopping, you've probably come across moissanite. It's one of the most popular diamond alternatives on the market — and it's often confused with lab-grown diamonds. They're not the same thing.
Here's the honest comparison between moissanite and diamond, including how they look, how they perform, and who should choose which.
What Is Moissanite?
Moissanite is a naturally occurring silicon carbide mineral that was first discovered in a meteor crater in 1893. Natural moissanite is extremely rare, so almost all moissanite on the market today is lab-created.
Unlike lab-grown diamonds — which are chemically identical to natural diamonds — moissanite is a completely different material. It looks similar to a diamond, but it's not a diamond.
What Is a Diamond?
A diamond is pure carbon arranged in a crystal lattice structure. Both natural diamonds (mined from the earth) and lab-grown diamonds (created in a laboratory) have the exact same chemical composition and crystal structure. They are real diamonds.
Key Differences at a Glance
Composition: Diamond = pure carbon. Moissanite = silicon carbide.
Hardness: Diamond = 10 Mohs (hardest material on earth). Moissanite = 9.25 Mohs (very hard, but slightly less than diamond).
Brilliance: Diamond = refractive index 2.42. Moissanite = refractive index 2.65-2.69 (higher — meaning moissanite can appear more colorful in light).
Price: Diamond = $600-$7,500+ per carat depending on type. Moissanite = roughly $400-$800 per carat.
Sparkle: Diamond = white and gray brilliance with subtle fire. Moissanite = more colorful "rainbow" flashes, especially in sunlight.
How They Look on the Finger
To an untrained eye, moissanite and diamond look very similar. Both are white, brilliant stones that sparkle in light. But side by side, the differences emerge:
Moissanite produces more colorful flashes — sometimes described as a "rainbow" or "disco ball" effect. Diamond produces more subtle white and gray brilliance with less colorful fire.
Some people prefer the extra sparkle of moissanite. Others find it looks less "natural" than diamond. It's entirely personal preference.
Durability Comparison
Diamond is the hardest material on earth at 10 on the Mohs scale. Moissanite is 9.25 — very hard, but not as hard as diamond. For everyday wear, both are excellent choices. A diamond will resist scratching slightly better, but moissanite is hard enough for a lifetime of daily wear.
Price Comparison
Moissanite is significantly cheaper than both natural and lab-grown diamonds. A 1-carat moissanite typically costs $400 to $800. A 1-carat lab-grown diamond costs $600 to $1,200. A 1-carat natural diamond costs $4,500 to $7,500.
If budget is your primary concern and you want the largest possible stone, moissanite gives you the most size per dollar.
Which Should You Choose?
Choose lab-grown diamond if: You want a real diamond — identical to natural in every way — at a much lower price. You want the same look, feel, and performance as a natural diamond without the mining.
Choose moissanite if: You love extra colorful sparkle. You want the absolute best price for a large stone. You don't mind that it's not a diamond — you want a beautiful stone that happens to be different.
Choose natural diamond if: The tradition and rarity of a natural stone matter to you. Resale value is important. You want a stone with geological heritage.
Frequently Asked Questions
Can you tell moissanite from diamond?
Yes — with practice. Moissanite has more colorful flashes than diamond, especially in sunlight. A trained jeweler can identify it with a loupe, and a diamond tester will distinguish them immediately.
Is moissanite as durable as diamond?
Very close, but not quite. Moissanite is 9.25 on the Mohs scale — the second hardest gemstone after diamond. It's suitable for daily wear.
Does moissanite get cloudy over time?
No. Quality moissanite does not cloud, fade, or yellow over time. It maintains its brilliance.
Find Your Stone at Lara Jewels
At Lara Jewels, we specialize in lab-grown and natural diamond engagement rings. Browse our collection or book a consultation to compare stones side by side.
