Both lab-grown diamonds and moissanite are created in a laboratory, so they're often confused — but they are fundamentally different stones with different properties. If you're deciding between them, here's the real difference.
The Core Distinction
Lab-grown diamond is a real diamond — pure crystallized carbon, chemically, physically, and optically identical to a mined diamond. It's grown in a lab instead of underground, but it is 100% diamond. Moissanite is a completely different mineral — silicon carbide — that happens to look similar to a diamond but is not a diamond at all.
Hardness
Diamond (lab-grown or mined) is the hardest natural material — a 10 on the Mohs scale, virtually scratch-proof. Moissanite scores an impressive 9.25 — harder than most gemstones, but still not diamond. For everyday wear, both are durable; diamond is simply the most scratch-proof material on Earth.
Sparkle: Fire vs. Brilliance
Here's the visual difference. Moissanite has more fire than diamond — it throws many more colorful rainbow flashes in bright light. Some people love the extra sparkle; others find it a little distracting or "rainbow-heavy." Lab-grown diamonds have the classic, sharp white brilliance of a diamond with a subtler fire. It comes down to taste — do you want calm, defined diamond sparkle, or lots of color?
Durability of Brilliance
Both maintain their sparkle with care. Moissanite is durable and keeps its fire. But because a lab-grown diamond is a true diamond, it never fades, clouds, or loses its brilliance over decades — exactly like a mined diamond. Both are lifetime stones with proper care.
Price and Value
Moissanite is cheaper than lab-grown diamond — often dramatically so. But a lab-grown diamond is a genuine diamond: it can be certified by GIA or IGI, appraised, and holds the identity and value of a real diamond. Moissanite is a beautiful simulant but isn't a diamond and doesn't carry that same certification and value story.
Which Should You Choose?
Choose a lab-grown diamond if you want a real diamond — full hardness, classic brilliance, certification, and the ability to say "it's a diamond." Choose moissanite if you love extra rainbow fire and want the absolute lowest cost for a large, sparkly stone. Neither is "wrong" — it's about what matters most to you.
Understanding the difference lets you choose with confidence. At Lara Jewels, we work in lab-grown diamonds and can show you exactly how they compare to moissanite side by side.
