Buying a Moissanite Ring – The Ultimate Guide

Moissanite has become one of the most sought-after stones for engagement rings—and for good reason. With brilliant fire, ethical origins, and outstanding value, it offers a modern alternative to traditional diamonds.

But how do you make sure you're getting the right moissanite, in the right cut, size, quality, and setting?

This comprehensive buying guide covers everything you need to know before choosing a moissanite ring—whether it’s your first time shopping or you’re comparing against lab or mined diamonds.

1. What Is Moissanite? A Quick Recap

Moissanite is a lab-created gemstone made from silicon carbide. Known for its incredible brilliance, it scores 9.25 on the Mohs scale and is one of the hardest, most durable stones suitable for everyday wear.

Unlike cubic zirconia or other simulants, moissanite doesn’t cloud over time, and its sparkle rivals (and in some cases exceeds) that of diamonds.

2. How to Choose the Right Moissanite Cut

Cut affects how a stone catches and reflects light. The most popular moissanite cuts are:

✨ Round Brilliant – Maximum sparkle, timeless appeal

✨ Oval – Elegant, elongating on the hand

✨ Radiant – Modern mix of sparkle and shape

✨ Cushion – Romantic, soft corners, vintage-inspired

✨ Pear – Feminine and unique

✨ Marquise – Bold, dramatic, art-deco flair

💡 Tip: Want classic sparkle? Go brilliant cut. Prefer a subtle shimmer? Consider crushed ice.

3. Sizing: Carat vs mm in Moissanite

Unlike diamonds (sold by carat weight), moissanite is often sold by millimetre size due to its different density.

Moissanite Size Chart (approximate):

💡 Ask your jeweller to specify millimetre size and diamond equivalent weight to avoid confusion.

4. What Colour Grade Should You Choose?

Premium moissanite (like we use at Diamond Lab) is often graded as:

• DEF – Colourless (most similar to top-grade diamonds)

• GHI – Near colourless (slightly warmer tones)

All our moissanite stones are D colour and VVS1 clarity by default, offering crisp, icy brilliance.

5. Clarity Matters Less—But Still Counts

Moissanite is created under controlled conditions, so most stones are eye-clean (free from visible inclusions).

Look for VVS to VS clarity grades. Avoid moissanite with cloudy zones or surface blemishes, which may impact long-term sparkle.

6. Choosing the Perfect Setting

Moissanite pairs beautifully with all metals, but here are some top trends:

• Yellow Gold – Warm, classic, bold

• Platinum or White Gold – Sleek, modern, icy contrast

• Rose Gold – Romantic, soft finish

Popular styles:

• Solitaire – Focus on the stone

• Bezel/Half Bezel – Secure, clean aesthetic

• Three-Stone – Symbolic, balanced sparkle

• Halo or Hidden Halo – Extra brilliance

7. Moissanite Certification & Brand Trust

Unlike diamonds, moissanite is typically not graded by GIA or IGI. Instead:

• Top-tier brands offer their own internal certification

• Ask for proof of D/VVS1 quality and origin

• Work with trusted jewellers who provide transparency

📌 At Diamond Lab, all moissanite rings come with quality assurance and full customisation options.

8. Maintenance & Longevity

Moissanite is very low-maintenance:

• Clean with warm water and mild soap

• Avoid exposure to harsh chemicals (e.g. chlorine)

• Ultrasonic cleaners are generally safe

• Use a soft toothbrush to keep facets clean

💡 Moissanite retains its brilliance for decades, making it a long-term choice—not just a placeholder.

9. Customisation Tips

Designing a moissanite engagement ring? Consider:

• Adding a hidden birthstone

• Mixing moissanite with lab diamond accents

• Engraving meaningful words or dates

• Playing with band thickness, height, or stacking

Our clients often opt for unique tweaks that turn a simple ring into a personal heirloom.

10. Why Choose Moissanite?

✅ Outstanding sparkle
✅ Exceptional value
✅ Completely conflict-free
✅ Customisable in any size or cut
✅ Durable and long-lasting

It’s not “less than” a diamond. It’s simply a different kind of brilliance.

Explore Moissanite in Person or Online

Whether you’re based in Perth or shopping from across Australia, we’re here to help you compare cuts, sizes, and styles—then create your own custom ring.

📍 Book a moissanite consultation with Diamond Lab