Can You Tell the Difference Between Moissanite and Diamond?

If you’re considering moissanite for your engagement ring, you might be wondering:
Will people know it’s not a diamond?
Does it look different in real life?
Will anyone notice?

The truth? Most people can't tell the difference—even in side-by-side comparisons. But there are some subtle differences worth knowing before you make your decision.

Let’s break it down visually, scientifically, and practically.

1. Visual Differences: Moissanite vs Diamond

Brilliance (White Light Reflection)

• Diamond: Crisp, sharp sparkle with classic white brilliance

• Moissanite: Highly refractive with more intense, sometimes colourful fire

💡 In bright light or direct sun, moissanite often appears “livelier” or more rainbow-like.

Fire (Coloured Light Reflection)

• Moissanite has more fire than diamond

• Some describe this as “disco-ball” sparkle (especially in larger sizes)

Clarity and Colour

• Moissanite is usually DEF colour, VVS1 clarity

• Lab diamonds come in a broader range but can match moissanite in top grades

• Visually, both look “eye-clean” and colourless in most rings

Cut and Shape

Both stones are available in:

• Round brilliant

• Oval, pear, radiant

• Cushion, marquise, emerald

• Fancy shapes and crushed ice cuts

So from a design standpoint, both stones can look identical.

2. Can a Jeweller Tell the Difference?

Yes—using tools.

Gemologists and jewellers use:

• Gem testers (to test heat or electrical conductivity)

• Magnification to examine facet doubling in moissanite

• Certification paperwork (e.g., IGI or GIA)

But your average friend or coworker? Highly unlikely.
💡 Without tools, even professionals can be fooled at first glance.

3. Real-Life Conditions: Will People Notice?

Most people won’t notice unless:

• You tell them

• They work in the jewellery industry

• They’re comparing two rings side by side, under strong lighting

In everyday wear—restaurants, photos, events—moissanite and diamonds are virtually indistinguishable in their setting, size, and sparkle.

4. Social Perceptions: Does It Matter If They Know?

This is deeply personal.

Some buyers want their ring to “pass” for a diamond. Others proudly choose moissanite for:

• Ethical reasons

• Budget flexibility

• Larger size for their price

• A modern, meaningful alternative

At Diamond Lab, we believe luxury is about intention—not labels.

5. The “Tell Test” Summary

If you're choosing based on appearance alone, moissanite passes every visual test.

Explore This Look:

✨ Luna Oval Solitaire Ring – Lab Diamond or Moissanite
A timeless setting that lets your stone shine—diamond or moissanite—without distraction.

Final Thoughts: Choose What Reflects You

At the end of the day, the real question isn’t “can others tell?”

It’s:

“Do you love how it looks, feels, and reflects your values?”

Both moissanite and lab diamonds offer incredible beauty.
One isn’t “better”—they’re just different. And knowing those differences helps you choose more confidently.

Still Deciding Between the Two?

Come see moissanite and lab diamonds side by side in our Perth showroom, or schedule a virtual consultation with one of our experts.

📍 Book Your Appointment