How to Tell if Your Moissanite Is Genuine

How to Tell if Your Moissanite Is Genuine: Simple Ways to Verify Your Stone

Moissanite has gained massive popularity as a diamond alternative due to its brilliance, durability, and ethical sourcing. But with its rise in demand, many people wonder: How do I know if my moissanite is real? Whether you're comparing moissanite vs. lab diamond, testing a moissanite diamond, or wondering does moissanite pass a diamond tester, this guide will walk you through everything you need to know.

Let’s break it down in simple steps.

 

What Is Moissanite and Why It Matters?

Moissanite is a gemstone made from silicon carbide (SiC). Naturally rare, almost all moissanite used in fine jewelry today—like our pieces at Riant Fine Jewelry—is lab-created. But here’s the key: just because it’s lab-made doesn’t mean it’s fake. Moissanite is not a lab-grown diamond, but it is a real gemstone, just different in composition from diamonds.

Because of its similar sparkle and appearance, many mistake it for a diamond—or worry theirs might be a fake.

 

How to Check if Your Moissanite Is Real

1. Check the Sparkle (Fire and Brilliance)

Moissanite is known for its intense fire—that is, the colorful flashes of light it reflects. If you look closely in sunlight or under bright LED light, moissanite often shows more rainbow-colored flashes than a diamond, which shows more white brilliance.

  • Too little sparkle? Might not be moissanite.
  • Super fiery and colorful? Likely moissanite.

2. Does It Pass a Diamond Tester?

Many people use diamond testers to verify stones. But here’s a trick: moissanite can pass traditional diamond testers because it conducts heat similarly to diamonds.

  • However, moissanite fails electrical conductivity tests, which some advanced testers now include.
  • For a proper check, use a dual tester (thermal + electrical) or consult a jeweler.

So, the answer to “does moissanite pass a diamond tester?” is: yes, but not all testers. It may give a false positive, especially on older devices.

3. Check the Weight

Moissanite is slightly lighter than diamonds. If you have two stones of the same size, the moissanite may weigh a bit less. But this method is only helpful if you’re comparing side-by-side or with tools.

 

Moissanite vs Lab Diamond: Know the Difference

Understanding what moissanite is not helps you verify it better.

Feature

Moissanite

Lab-Grown Diamond

Material

Silicon Carbide (SiC)

Pure Carbon

Hardness

9.25 Mohs

10 Mohs

Fire/Brilliance

Very high

Moderate (like natural diamonds)

Will it pass a diamond tester?

Often yes (thermal)

Yes

Is it a diamond?

Yes

Yes

Ethical & Lab-Created

 Yes

Yes

So, if you’re wondering, is moissanite a lab-grown diamond?—No. Moissanite is its own gem. Both are lab-created and ethical, but they're chemically and visually different.

 

4. Loupe or Microscope Test

With a jeweler’s loupe or microscope:

  • Moissanite may show double refraction when you look through the table (top) facet.
  • This effect is less visible in round cuts but can still be noticeable in emerald or oval cuts.

Diamonds, natural or lab-grown, do not show this kind of doubling.

 

5. Ask for Certification

Reputable moissanite pieces often come with a certificate from trusted labs (e.g., GRA or Charles & Colvard for branded moissanite). At Riant Fine Jewelry, our moissanite pieces come with detailed documentation to ensure you're getting exactly what you paid for.

If your stone has no certificate and doesn’t match standard moissanite characteristics, it’s worth having a jeweler inspect it.

 

6. Take It to a Professional

Still not sure? The best way to confirm your stone is real is to take it to a certified gemologist or jeweler. They can verify whether it’s:

  • Moissanite
  • Lab-grown diamond
  • Cubic zirconia (CZ)
  • Glass or fake

At Riant Fine Jewelry, we recommend an expert check especially if you bought your stone from an unknown or non-reputable seller.

 

Final Thoughts: Trust in Real Moissanite

Moissanite is a real gemstone with its own unique beauty and benefits. Whether you love it for its eco-conscious creation, its eye-catching sparkle, or its affordability, knowing it’s genuine brings peace of mind.

Here’s a recap to help you:

  • Moissanite sparkles more—with fiery rainbow light.
  • It may pass some diamond testers, but advanced tools reveal the difference.
  • It’s not a lab-grown diamond, though both are ethical and lab-made.
  • Look for certificates, loupe tests, and expert opinions for verification.

At Riant Fine Jewelry, we offer genuine moissanite jewelry crafted with precision and passion. Each piece is backed by quality assurance and expert craftsmanship—so you always sparkle with confidence.

Read more: Different Styles of Moissanite Necklaces

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