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Moissanite vs. Lab-Grown vs. Natural Diamonds: How to Choose Your Center Stone

Close-up comparison of moissanite, lab-grown, and natural diamond sparkle — Farsi Jewelers, Sandy Springs

Here's a clear, local guide from Farsi Jewelers in Sandy Springs — serving Metro Atlanta — to help you decide what's right for your ring: moissanite, lab-grown diamond, or natural diamond.

Last updated: August 2026 · Reviewed by our GIA Graduate Gemologist

2026 update: Lab-grown diamond prices have dropped close to what moissanite used to cost, so many couples now choose a lab-grown diamond — a genuine diamond at a near-moissanite price. But moissanite is still a wonderful choice in its own right: more fire and colorful sparkle, the lowest price, and a stone people who choose it tend to love for life. In fact, Farsi is one of the few jewelers in the Atlanta area that custom-designs moissanite engagement rings and repairs and resizes moissanite — many shops won't touch it. Whichever way you're leaning, here's how to choose.

Quick Comparison

  • Moissanite: Very bright, lowest price, different optical look than diamond, very durable.
  • Lab-grown diamond: Real diamond, same hardness and sparkle as natural, now priced close to moissanite — a popular choice for couples who want a true diamond for less.
  • Natural diamond: Traditional rarity and long-term heritage, broad range of qualities and prices.

Moissanite vs. Lab-Grown vs. Natural Diamond: At a Glance

The fastest way to see how the three stones line up. These are the differences that actually matter when you're choosing a center stone for an engagement ring.

Moissanite Lab-Grown Diamond Natural Diamond
What it is Silicon carbide — a diamond alternative, not a diamond Pure carbon — a real diamond, grown in a lab Pure carbon — a real diamond, formed in the earth
Hardness (Mohs) 9.25 — excellent for daily wear 10 — the hardest material on earth 10 — the hardest material on earth
Sparkle & fire More fire — extra colorful flashes (dispersion 0.104); a livelier, flashier look Classic white brilliance (dispersion 0.044) Classic white brilliance (dispersion 0.044)
Certification — Independently certified by GIA or IGI; graded on the same 4Cs Independently certified by GIA or IGI; graded on the 4Cs
Relative price, ~1 ct* Lowest of the three Well below natural, and now close to moissanite Highest — rarity is the premium
Best for Lowest price & maximum sparkle Best overall value — a real diamond for less Tradition, rarity & long-term heritage

*Every stone is quoted individually, and the market moves. Price depends on cut, color, clarity, size, and certification — we'll show you exact current numbers in the showroom.

Moissanite vs. Lab-Grown Diamond

Many couples in Sandy Springs and Atlanta ask us about the difference between moissanite and lab-grown diamonds. While they can look similar at first glance, they are very different stones:

  • Composition: Lab-grown diamonds are pure carbon, chemically identical to natural diamonds. Moissanite is silicon carbide — a separate material with its own optical properties.
  • Sparkle: Moissanite has higher dispersion (0.104 vs. a diamond's 0.044) and is doubly refractive, so it throws off more fire — colorful flashes of light — especially in bright light. Diamonds, lab or natural, show a cleaner white brilliance.
  • Hardness: Diamonds are the hardest material on earth (10 on the Mohs scale). Moissanite is also extremely durable at ~9.25, making it excellent for daily wear.
  • Price: Moissanite is still the most affordable. But the gap has narrowed: lab-grown diamonds have come down close to moissanite for a comparable size, while a natural diamond of the same size and quality costs several times either one — rarity is the premium you pay.

If you want a real diamond at a price that used to only buy moissanite, lab-grown is a fantastic value. And if you love moissanite's extra fire and colorful sparkle, or you want the lowest price, moissanite is a beautiful choice — the people who pick it usually feel strongly about it, and we're glad they do. Just as important: we design custom moissanite rings and service them in-house, including repairs and resizing that many jewelers won't do on moissanite. Browse our moissanite engagement rings, or we can craft a custom piece around the stone you choose.

Which Fits Your Priorities?

Can't picture how they work together? Here's a real Farsi piece that uses both: a 14K white gold French-set engagement ring with a 9×7 oval moissanite center and diamond accents, custom made at Farsi Jewelers in Sandy Springs.

Best overall value: lab-grown diamond.
Lowest price: moissanite.
Classic tradition: natural diamond.
Everyday durability: all three perform well; diamond is the hardest (10 on the 1–10 Mohs hardness scale), moissanite ~9.25.

Our honest take: at today's prices, a lab-grown diamond makes the most financial sense for most couples — you get a genuine diamond for close to what moissanite costs. The exception is simple and important: if you truly love moissanite, it's the right choice for you, and we'll happily design it and look after it.

See It on Your Hand

The best way to decide is to compare the stones side by side. Use our in-store custom ring builder to try shapes and sizes in person, then review clarity and color grades and cut quality with a GIA Graduate Gemologist right here in Sandy Springs. Designing the whole ring, not just the stone? See our guide to custom engagement rings in Atlanta — settings, styles, and how our 3D Bespoke Method works.

Prefer to talk it through first? Call or text us at 770-206-8000 — no-pressure showroom, appointments welcome. We work with every budget, no minimum.

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Expert Insight

“With lab-grown prices where they are, a lot of couples land on a lab-grown diamond — but moissanite still has a real following, and we're glad to design and repair it when most shops won't. We put both in front of people and let the stone speak for itself.” — our GIA Graduate Gemologist

Frequently Asked Questions

What is the difference between moissanite and a lab-grown diamond?
A lab-grown diamond is a real diamond — pure carbon, chemically and optically identical to a natural diamond, just grown in a lab instead of the earth. Moissanite is a different material (silicon carbide) that looks similar but is a diamond alternative, not a diamond. Moissanite has more fire — extra colorful flashes — and a lower price; a lab-grown diamond has classic diamond brilliance and grades on the same 4Cs as a natural stone.
Is a lab-grown diamond better than moissanite?
It depends on your priority. Many couples now choose a lab-grown diamond because it's a genuine diamond and prices have dropped close to moissanite. But if your top priority is the lowest possible price, or you love moissanite's extra sparkle, moissanite is an excellent pick — and one we're glad to custom-make and service. Neither is “wrong”; they're different stones at different price points.
How much does a 1-carat lab-grown diamond cost compared to moissanite?
They are much closer than they used to be. A 1-carat lab-grown diamond now costs somewhat more than a comparable moissanite rather than several times more, which is why many couples who once planned on moissanite choose a lab-grown diamond instead. A natural diamond of the same size and quality costs several times either one. Every stone is quoted individually — price depends on cut, color, clarity, and certification, so we'll show you exact current numbers in the showroom.
Can a jeweler tell moissanite from a lab-grown diamond?
Yes. A standard diamond tester reads thermal conductivity, and moissanite can read like diamond on those — but a moissanite tester (which checks electrical conductivity) tells them apart instantly, and a gemologist can spot moissanite's doubled facet edges and extra fire under magnification. Lab-grown diamonds test as diamond because they are diamond. We're glad to test any stone for you in store.
Is moissanite still worth it in 2026?
Yes. Moissanite is a beautiful, durable, budget-friendly stone with more fire than a diamond. Lab-grown prices have fallen close to moissanite, so for most couples a lab-grown diamond now makes more financial sense — but plenty of people genuinely love moissanite and choose it on purpose, and they tend to be very happy they did.
Do you custom-make and repair moissanite rings?
Yes — and it's something we're known for. Many jewelers won't design with moissanite or won't repair and resize it, but at Farsi we custom-design moissanite engagement rings and service them right here in Sandy Springs, including resizing, prong and setting repair, and cleaning. If you already own a moissanite piece that another shop turned away, bring it in.
Is moissanite as durable as diamond?
Yes. Moissanite is ~9.25 on the Mohs scale, which makes it highly durable for daily wear. Diamond is harder at 10, but both are excellent for engagement rings.
Do lab-grown diamonds test as real diamonds?
Yes. Lab-grown diamonds are chemically, physically, and optically identical to natural diamonds. They pass diamond testers and are graded by the same standards used for natural stones.
How do I care for moissanite or lab-grown diamonds?
Both are easy to care for. Clean them at home with mild dish soap and warm water, or bring them to Farsi Jewelers in Sandy Springs for professional ultrasonic cleaning and inspection. Regular maintenance keeps them brilliant.
Can I compare them in person at your Sandy Springs store?
Yes — our custom ring builder lets you try different sizes, shapes, and stones side by side. This is the best way to see moissanite and lab-grown diamonds up close before deciding which suits your style and budget. Book an appointment or stop by — see our hours and directions.
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