Does Moissanite Pass a Diamond Tester? (Yes — Here's Why)

Short answer: yes. Moissanite passes a standard diamond tester. Here's exactly why — and what that means when you're buying iced-out jewelry.

How a diamond tester actually works

The pen testers used at jewelry counters and pawn shops measure thermal conductivity — how fast a stone pulls heat away from the tip. Diamond is one of the best heat conductors in nature, so a stone that moves heat like diamond beeps "diamond."

Moissanite (silicon carbide) conducts heat almost identically to diamond. Put a standard tester on a moissanite stone and it reads diamond. Every time.

Moissanite vs CZ: the tester doesn't lie

This is where most "iced-out" jewelry fails. Cubic zirconia — what 90% of cheap hip-hop jewelry uses — is a poor heat conductor. Touch a tester to CZ and it fails instantly. That's the difference between jewelry that looks icy in photos and jewelry that tests like ice in person.

Can anything detect moissanite?

We keep it 100 with you: dual testers that also measure electrical conductivity can flag moissanite, because moissanite conducts electricity and diamond doesn't. A gemologist with a loupe can also spot moissanite's signature double refraction. But the standard pen tester someone pulls out at a shop or a party? It says diamond.

Why this matters for your chain

When you're wearing a 15mm cuban with hundreds of stones, the question people ask is "is it real?" With moissanite, the tester answers for you. You get the pass, the rainbow-fire sparkle (more brilliance than diamond, on paper), and a piece that costs a fraction of a diamond bussdown — set in solid 925 silver, not brass.

Every piece at FAZE Jewelry is guaranteed to pass a standard diamond tester. That's the whole point of the brand: ice without the price.

FAQ

Does moissanite pass a diamond tester?

Yes. Standard diamond testers measure thermal conductivity, and moissanite conducts heat almost identically to diamond — so it reads as "diamond" on a standard pen tester. Only specialized dual testers that also measure electrical conductivity can tell them apart.

Why does moissanite pass the tester but cubic zirconia doesn't?

Cubic zirconia (CZ) is a poor heat conductor, so it instantly fails a thermal tester. Moissanite is silicon carbide, one of the most thermally conductive gems on earth — which is why it passes where CZ fails.

Is moissanite a fake diamond?

No. Moissanite is its own gemstone — silicon carbide — with its own chemistry. It's not an imitation trying to be a diamond; it actually outperforms diamond in brilliance (2.65 refractive index vs 2.42) and costs a fraction of the price.

Will a jeweler be able to tell my chain is moissanite?

With a standard tester, no — it passes. A trained gemologist with a loupe can spot moissanite's double refraction, and a dual electric tester can flag it. To the eye on your neck, nobody can tell.

Does moissanite lose its sparkle over time?

No. Moissanite is a 9.25 on the Mohs hardness scale (diamond is 10), harder than sapphire and ruby. It doesn't cloud, fade or scratch under normal wear — it sparkles the same in 20 years.

Do FAZE Jewelry pieces pass the diamond tester?

Yes — every moissanite piece we sell passes a standard diamond tester, and we guarantee it. Our chains, bracelets, pendants and rings are pavé-set with real moissanite stones in solid 925 sterling silver.

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