Do Lab Diamonds Pass a Diamond Tester?
When it comes to shopping for diamonds, the question always comes up—will a lab-grown diamond pass a diamond tester? Whether you're investing in your first piece or leveling up your drip, it's a question worth asking.
At Iceberg Diamonds, we’re all about making sure your shine is certified—no questions, no cap. Let’s break down exactly how diamond testers work, how lab diamonds compare to natural ones, and what you need to know before you buy.
First up: What’s a Diamond Tester?
A diamond tester is a handheld device that tells you whether a stone is a diamond or not. Most models test how well a gemstone conducts heat. Some advanced testers also check for electrical conductivity, giving more accurate results.
Why does this matter? Because diamonds have a unique structure that conducts heat differently than fakes like cubic zirconia or glass.
If you touch the probe to a real diamond, it responds in a way no impostor can replicate. That’s why testers are used by jewelers, collectors, and even casual buyers looking to verify their ice.
So, Do Lab Diamonds Pass the Test?
Yes. Lab diamonds pass standard diamond testers.
They share the exact same physical, optical, and chemical makeup as mined diamonds. That includes the carbon crystal structure, thermal conductivity, and density. Because of that, lab-grown diamonds show up as "real" on any quality thermal diamond tester.
Whether it’s in a ring, chain, grill, or pendant—your lab diamond is the real deal, and it shows.
Can a Tester Tell the Difference Between Lab and Natural?
Here’s the twist—a regular diamond tester can’t tell the difference between a lab-grown and a natural diamond. Both will register the same on the tester.
Why? Because a diamond tester isn't designed to determine a diamond’s origin. It only tests what the stone is, not where it came from.
Watch Out for Moissanite Confusion
Moissanite’s got serious shine—it’s a top-tier diamond alternative with its own fire and flair. But here’s the thing: it conducts heat like a diamond, so a basic tester might call it real when it’s not.
That doesn’t mean it’s fake—it’s just a different kind of ice. If you really want to know what you’re working with, grab a dual tester that checks heat and electricity—or better yet, roll through Iceberg Diamonds and let us test it for you. No stress, just the facts.
What Lab Diamonds Bring to the Table
Lab-grown diamonds don’t just pass the tester—they pass the style test too.
They’re real diamonds, but with more flexibility in:
-
Size – Get more carats for your budget
-
Design – Go custom with bigger stones, bolder settings, and colored accents
-
Clarity – Many lab diamonds come with high clarity grades, making your piece pop even more
At Iceberg, we help you design custom engagement rings, tennis chains, or iced-out earrings using high-quality lab-grown diamonds that pass every test—literally and visually.
Start your Custom Lab-Grown Ring Design today.
Why Test Your Diamonds?
You might be wondering—should I even test my diamonds? If you're buying from a reputable jeweler like us, you’re already good. But having that extra peace of mind never hurts.
Diamond testers are also great if you’re:
-
Buying vintage or secondhand
-
Checking an older piece you inherited
-
Comparing stones while shopping
And if you’re ever unsure—come in and let us handle it. Our team is trained to identify lab-grown vs. natural and confirm authenticity on the spot.
Schedule your In-Store Diamond Check with Iceberg Diamonds.
Final Word: Real Ice is Real Ice
So, back to the question: Do lab diamonds pass a diamond tester? Yes—because they are real diamonds.
They bring the same fire, durability, and shine as mined diamonds, and with today’s tech and craftsmanship, you’ve got endless possibilities for design, size, and price.
At Iceberg Diamonds, we don’t just sell jewelry—we build your look. Whether you’re stacking rings, dripping in layers, or locking in a one-of-a-kind custom ring, your shine is safe with us.
-
Got questions? Pull up or hit us up here.