Can Jewelers Tell If My Moissanite Isn’t a Diamond?

Moissanite has become a top choice for those seeking diamond-like brilliance without the high price tag. But can a jeweler tell the difference? The short answer: Yes—but not always at first glance.


Why Does Moissanite Look So Much Like a Diamond?

Moissanite is often mistaken for a diamond because of its exceptional clarity, durability, and brilliance. Here’s how it compares:

Feature Moissanite Diamond
Hardness (Mohs Scale) 9.25 (Extremely Durable) 10 (Hardest Natural Material)
Brilliance (Sparkle) Higher Fire & Rainbow Flash Classic White Sparkle
Thermal Conductivity Similar to Diamond (May Pass Basic Testers) High (Used for Testing)
Double Refraction Yes (Light Bends Twice) No (Single Refraction)
Density (Weight) Slightly Lighter Heavier
Cost Significantly More Affordable Higher Price

Moissanite’s sparkle is often even stronger than a diamond’s, making it visually indistinguishable unless inspected under specialized tools.


How Do Jewelers Identify Moissanite?

While moissanite passes many diamond-like tests, trained jewelers can still detect it with specific methods:

Diamond Tester – Standard diamond testers measure thermal conductivity, which is similar in both stones, meaning moissanite may pass as a diamond. However, moissanite-specific testers will reveal the difference.

Magnification (Jeweler’s Loupe) – Under 10x magnification, moissanite exhibits double refraction, meaning its facets may appear slightly doubled—something diamonds don’t have.

Weight Measurement – Moissanite is slightly lighter than a diamond of the same size, but this difference is only noticeable with precise jeweler’s scales.

Brilliance Test – Moissanite has more fire (rainbow-like flashes) compared to a diamond’s crisp, white sparkle. Under direct light, a trained eye may detect this difference.


Can the Average Jeweler Tell Right Away?

Most jewelers won’t be able to tell immediately—especially if your moissanite is of high quality and well-cut. However, if they use specialized tools, they can eventually distinguish it from a diamond.

🔹 Does this mean moissanite is lower quality? Not at all! Moissanite is a premium, highly durable gemstone that offers stunning beauty, ethical sourcing, and incredible value.


Final Verdict: Should You Be Concerned?

If you’re choosing moissanite for its beauty and affordability, there’s nothing to worry about. It’s not about “fooling” anyone—it’s about owning a stunning, durable, and high-quality gemstone that rivals diamonds in appearance.

Looking for premium moissanite that’s indistinguishable from a high-quality diamond? Explore our moissanite collection today.

Back to blog