Does Moissanite Pass a Diamond Tester? Yes — Here's the Full Story

This is one of the first questions every customer asks us at Paradise Gems Atlanta. The short answer is yes. But the real answer is a little more interesting than that.

I get asked this question almost every single day at Paradise Gems Atlanta. Someone picks up a piece, looks at me and says — "but does it actually pass the tester?"

The answer is yes. Every single time. And I'm going to explain exactly why — because once you understand the science behind it, you'll never worry about this question again.

Why Moissanite Passes the Diamond Tester

Standard diamond testers — the little pen-shaped devices you see jewelers use — work by measuring thermal conductivity. They send a tiny amount of heat through the stone and measure how fast that heat moves through it.

Here's the thing most people don't know: moissanite and diamonds have almost identical thermal conductivity. They transfer heat at nearly the same speed. So when you press a standard tester against a moissanite stone, it reads it exactly the same way it reads a diamond.

This isn't a trick or a workaround. It's simply how the physics works. Silicon carbide — which is what moissanite is made of — conducts heat in a way that is remarkably similar to carbon, which is what diamonds are made of. Nature accidentally gave us a gemstone that mimics diamonds at the molecular level.

What About More Advanced Testers?

This is where I want to be completely honest with you, because some sellers won't tell you this.

There are two types of diamond testers on the market. The standard thermal conductivity tester — which is what 99% of jewelers use — reads moissanite as a diamond. But there are also more advanced "moissanite detectors" that use a different method called electrical conductivity. These specialized testers can sometimes distinguish moissanite from diamond.

The important thing to know is that these advanced testers are rare, expensive, and almost never used in everyday settings. Your friends, your family, the jeweler at the mall — they use the standard tester. And the standard tester says: diamond.

At Paradise Gems Atlanta, we're always upfront about what our jewelry is. We sell genuine GRA certified moissanite — not as a fake diamond, but as its own beautiful gemstone that happens to outperform diamonds in sparkle and cost a fraction of the price.

Is It Wrong to Wear Moissanite?

This question comes up more than you'd think. The answer is absolutely not.

Moissanite is a real, genuine gemstone with its own properties, its own certification, and its own identity. Wearing moissanite isn't pretending to wear a diamond — it's choosing a gemstone that outsparkles diamonds, lasts just as long, costs 90% less, and has zero ethical concerns around mining.

The fact that it passes the diamond tester is simply a bonus — not the reason to buy it. The reason to buy it is that it's genuinely beautiful, genuinely durable, and genuinely worth every dollar.

How We Test Every Piece at Paradise Gems Atlanta

Before any piece leaves our Atlanta showroom, we run it through a standard diamond tester. Not because we need to prove anything — we already know what's in the jewelry — but because we want every customer to have that experience themselves when they receive their order.

We include a GRA certificate with every single piece. That certificate tells you the exact stone specifications: the cut, the color grade, the clarity grade, and the carat weight. It's the moissanite equivalent of a GIA diamond certificate.

When your Paradise Gems piece arrives and you run your own tester over it — and it reads as a diamond — that's not an accident. That's physics. And that's the quality we stand behind.

What You Get With Every Paradise Gems Atlanta Order

GRA Certificate — verifying your stone's cut, color, clarity and carat weight.

VVS D Color moissanite — the highest colorless grade available.

Passes standard diamond tester — guaranteed, every time.

925 sterling silver setting — real silver that never fades.

30-day hassle-free returns — shop with complete confidence.

Ships fast from Atlanta, GA — most orders arrive in 2-4 days.

Frequently Asked Questions