Yes. Moissanite passes a standard diamond tester. It is one of the first questions customers ask us at Paradise Gems Atlanta, almost every day. Someone picks up a piece, looks at us and asks, “but does it actually pass the tester?”

The short answer is yes. The full answer is more interesting, and it is worth knowing before you buy. Below we explain why it passes, which testers can tell the difference, and how we test every piece in our Atlanta showroom.

How We Test Moissanite in Our Atlanta Showroom

We have tested hundreds of moissanite pieces with standard thermal diamond testers, the same type used by jewelry stores, pawn shops, and appraisers across the country. Here is what happens when we test a piece:

1. We place the tester’s probe tip on the moissanite stone.
2. The tester beeps and lights up in the “diamond” zone.
3. We check the stone against its GRA certificate to confirm it is VVS D color moissanite.

Every piece is tested before it leaves our showroom. If something is not right, it does not ship. We do this not to prove anything, but so you get the same result when you test your piece at home.

Why Moissanite Passes a Diamond Tester

A standard diamond tester, the small pen-shaped device most jewelers use, measures thermal conductivity: how quickly heat moves through a stone.

Diamonds move heat extremely well, which is why the tester reads them as “diamond.” Most diamond look-alikes, like cubic zirconia, white sapphire, and glass, move heat poorly and fail right away.

Moissanite is the exception. Moissanite (silicon carbide) also conducts heat very well, high enough that a standard thermal tester cannot tell it apart from diamond. It is not a trick or a flaw in the tester. It is simply how the material behaves.

What About Advanced Testers? The Honest Answer

This is where some sellers stop talking. We won’t.

There are newer multi-testers that measure electrical conductivity as well as heat. Moissanite conducts electricity and diamond usually does not, so these multi-testers can tell moissanite from diamond. A trained gemologist with a loupe can also spot moissanite’s double refraction, which makes facet edges look slightly doubled under magnification.

Multi-testers cost more and are mostly used by gemologists, appraisers, and some higher-end jewelers. The basic thermal tester most people and many shops use reads moissanite as diamond.

We always tell customers exactly what they are buying. We sell GRA certified moissanite as its own beautiful gemstone, not as a diamond.

Is It Wrong to Wear Moissanite?

Not at all. Moissanite is a real gemstone with its own properties, its own certification, and its own identity. Wearing moissanite is not pretending to wear a diamond. It is choosing a stone with more sparkle, excellent durability (9.25 on the Mohs scale), and a much lower price, with no mining involved.

Passing the diamond tester is a bonus, not the reason to buy it. The reason to buy it is that it looks beautiful and lasts. Comparing options? Read our honest moissanite vs diamond comparison.

What Your GRA Certificate Confirms

Every piece from Paradise Gems comes with a GRA (Gemological Research Association) certificate. It confirms:

• Stone type: moissanite (silicon carbide)
• Color: D, the highest colorless grade
• Clarity: VVS, with inclusions invisible to the naked eye
• Cut: excellent
• Carat weight of your stone

So when someone asks “what is that stone?”, you have documented proof, not just a verbal answer.

Why Buyers Trust Paradise Gems Atlanta

• Every piece is inspected and tested before shipping. We check the stone, setting, plating, and clasp in our Atlanta showroom.
• Real store, real people. Visit us at AmericasMart, 250 Spring St NW, Atlanta, GA 30303, or ask us anything on WhatsApp.
• Easy returns. See our 30-day return policy.
• Real reviews. Read what customers say on our reviews page.

Frequently Asked Questions

Does moissanite pass a diamond tester every time?

It passes standard thermal diamond testers, which measure heat conductivity. Multi-testers that also measure electrical conductivity can identify moissanite.

Does moissanite pass a diamond tester at a pawn shop?

On a standard thermal tester, yes. If a pawn shop says your moissanite “failed,” they most likely used a multi-tester, which is designed to detect moissanite.

Can a jeweler tell moissanite from diamond?

Usually not with the naked eye. With a loupe, an experienced gemologist may notice moissanite’s double refraction or its stronger rainbow fire. A multi-tester will also tell them apart.

Is moissanite a fake diamond?

No. Moissanite is its own real gemstone, first discovered by Henri Moissan in 1893 in a meteor crater in Arizona. Today it is grown in a lab. It is not cubic zirconia and not glass.

Does moissanite get cloudy over time?

No. Unlike cubic zirconia, moissanite keeps its brilliance. More in will moissanite lose its sparkle.

Is moissanite worth buying?

For most buyers, yes. You get a certified gemstone that looks like a diamond, wears like one every day, and costs a fraction of the price.

Shop GRA Certified Moissanite from Atlanta

Every piece is VVS D color, comes with a GRA certificate, and is tested before it ships. Browse our tennis chains, Cuban link chains, engagement rings, and earrings, or visit our Atlanta showroom.