Moissanite vs Lab Diamond: Which Should You Choose?

If you’re shopping for an engagement ring, you’ve likely come across two beautiful options: moissanite and lab-grown diamonds. Both are ethical, affordable alternatives to mined diamonds, and both sparkle brilliantly. So… what’s the difference? And more importantly, which one is right for you?

At Diamond Lab, we specialise in both stones—and we’re here to help you make an informed choice, not just a trendy one.

1. What’s the Difference in Composition?

Let’s start with science.

Moissanite is a completely different gemstone from diamond. It’s not a simulant, like cubic zirconia—it’s a real gem in its own right. Lab diamonds, on the other hand, are chemically identical to mined diamonds, just grown in controlled environments rather than underground.

2. Brilliance and Fire: How They Sparkle

Moissanite reflects more rainbow-coloured flashes than diamonds, making it appear more sparkly in certain lights. Some love the fire; others prefer the understated shine of diamonds.

💡 If you want brilliance that catches every eye, moissanite is the winner. If you want timeless, subtle elegance, go with lab diamond.

3. Hardness and Durability

Both stones are suitable for daily wear and lifelong use. Diamonds are technically harder, but moissanite is still one of the most durable gems on earth—and will not scratch or chip easily.

4. Colour and Clarity

• Lab diamonds are graded using the same scale as mined diamonds (D–Z for colour, FL–I3 for clarity).

• Moissanite is usually sold in DEF colour and VVS1 clarity by default.

Moissanite is more consistent in clarity and whiteness due to its lab-controlled origins. Lab diamonds offer a range—which gives you more flexibility in budget and personal preference.

5. Price Comparison

💡 Moissanite offers a larger look for less money, making it ideal for couples who want to focus budget on the setting, matching band, or other meaningful details.

6. Ethics and Sustainability

Both stones are conflict-free, traceable, and sustainable. That said:

• Lab diamonds use more energy to produce.

• Moissanite has a lower carbon footprint and no mining impact.

✅ Moissanite is often the more eco-conscious option, making it ideal for sustainability-focused couples.

7. Which One Looks More Like a Mined Diamond?

If your goal is to replicate the look of a traditional diamond, lab-grown is the clear match. It’s chemically and optically identical.

But don’t underestimate moissanite. Most people won’t notice the difference without a gem tester—and many actually prefer its extra fire and affordability.

8. Emotional and Social Value

Let’s be honest—some people feel more emotionally connected to diamonds due to tradition, status, or family legacy.

But that’s changing. Moissanite is quickly gaining prestige as a smart, modern alternative. It says:

“We care about quality and meaning—not just labels.”

So… Which Should You Choose?

Choose Moissanite if you:

• Want more size for your spend

• Love intense sparkle and fire

• Prefer a low-maintenance, ethical gem

• Value modern luxury and uniqueness

Choose Lab Diamond if you:

• Want the traditional diamond look

• Prefer classic, crisp white light

• Desire higher resale value

• Feel emotionally tied to diamonds

Explore This Look:

✨ Elysian Pear Three-Stone Ring – Lab Diamond or Moissanite
A timeless design available in either stone—perfect for showcasing your values and your style.

Still Can’t Decide? See Them in Person.

We offer side-by-side comparisons, custom consultations, and expert guidance so you can make a confident, personal choice.

📍 Book a consultation at Diamond Lab