Do Lab-Grown diamonds Pass A Diamond Tester?
You’ve seen them — lab grown diamonds that sparkle just like mined ones. But when it comes to authenticity, one question always arises:
Do lab grown diamonds pass a diamond tester?
At Nazar’s & Co. Jewelers, this is one of the most common questions we hear, and it’s an important one. Because when you choose a diamond, you deserve to know exactly what you’re buying.
The Short Answer: Yes, Lab Grown Diamonds Pass Diamond Testers
Yes — lab grown diamonds do pass a diamond tester.
Why? Because lab grown diamonds are real diamonds — identical in composition, structure, and brilliance.
They share the same atomic structure, hardness, and thermal properties as natural ones. Diamond testers measure thermal conductivity, not origin. Both types conduct heat the same way, which is why the device reads them as identical.
That’s what makes lab grown diamonds so extraordinary — they’re visually, physically, and chemically the same, but born through human innovation instead of geological time.
How Diamond Testers Work and What They Detect
A diamond tester doesn’t reveal whether a diamond was mined or grown. It simply checks how heat travels through the gem.
Diamonds — lab or natural — conduct heat faster than any other gemstone, triggering the tester to read “diamond.”
What a tester can detect are simulants like cubic zirconia or glass, which trap heat differently and fail the test.
Expert´s Tip: If a jeweler uses an electrical conductivity tester, results can vary slightly depending on how the diamond was created — but both HPHT and CVD lab grown diamonds still test as real.
Why Some Lab Grown Diamonds May Show Slightly Different Results
While almost all lab grown diamonds pass, certain CVD-grown stones can contain trace metallic elements that slightly affect advanced readings.
It doesn’t mean the diamond is fake — only that it reacts differently to dual-mode testers that measure heat and electricity.
Expert testing — like that used by the team at Nazar’s & Co. Jewelers — always goes beyond a handheld device. Each stone is verified with precision instruments and certified by leading gemological laboratories.
Common Myths About Lab Grown Diamonds and Diamond Testers
Myth: If it passes, it must be natural.
Truth: Lab grown diamonds pass too. Both are real.
Myth: Lab grown diamonds are fake.
Truth: They’re identical in composition and brilliance — only the origin differs.
Myth: You can see the difference.
Truth: Even experts need specialized equipment to tell them apart.
Myth: Only natural diamonds are certified.
Truth: Lab grown diamonds receive the same grading reports from GIA, IGI, and others.
What to Look for When Buying a Lab Grown Diamond
When you shop for a diamond, the tester result is only the beginning.
The real measure of value lies in transparency, certification, and craftsmanship.
At Nazar’s & Co. Jewelers, each lab grown and natural diamond is carefully chosen, graded, and showcased side by side — so you can compare their sparkle and choose what feels right for you.
Design Insight: Most clients say that once they see both together, the decision becomes emotional, not technical. The sparkle that moves them wins — not the label attached to it.
Behind the Sparkle: More Than a Test Result
A diamond’s story isn’t written in where it was formed, but in what it represents.
Lab grown or natural, every diamond symbolizes something deeply human — love, promise, legacy.
Both pass the same scientific tests, but the real test happens when you see it catch the light. That’s when it becomes yours.
At Nazar’s & Co. Jewelers, every diamond is chosen for its brilliance, authenticity, and the emotion it’s meant to carry.
Final Thoughts: Lab Grown Diamond Authenticity
So, do lab grown diamonds pass a diamond tester?
Yes — because they’re real diamonds.
They pass every test that matters: durability, beauty, and meaning.
Discover the collection at Nazar’s & Co. Jewelers, where expertise meets emotion and every diamond — natural or lab grown — is chosen to shine for a lifetime.
Visit Nazar’s & Co. Jewelers
Experience the difference in craftsmanship and care.
10001 Westheimer Rd, Houston, TX
Contact Us | Schedule an Appointment