Diamond Authenticity & Safety FAQ

Q: How can you tell if a diamond is real?

Verify its IGI or GIA certificate at igi.org or gia.edu. Additional methods: thermal conductivity test, fog test, professional loupe inspection. Certificate verification is the only foolproof method.

Q: Can fake diamonds pass as real?

High-quality simulants like moissanite can fool basic testers but not advanced spectroscopic equipment. A certified diamond with a verifiable IGI or GIA report number eliminates all doubt.

Q: Do lab diamonds pass diamond testers?

Yes — lab-grown diamonds pass all standard diamond testers. They are real diamonds with the same thermal and electrical properties as natural diamonds. Only advanced spectroscopic equipment can distinguish lab-grown from natural.

Q: Is buying diamonds online safe?

Yes — when the retailer provides verifiable IGI or GIA certification, a clear return policy, and SSL-encrypted checkout. DEEVE provides IGI-certified diamonds with free shipping and a lifetime warranty.

How can you tell if a diamond is real?

Direct Answer: The most reliable way to confirm a diamond is real is by verifying its IGI or GIA certificate online. At-home tests are indicative but not definitive.

Certificate verification: Check the report number at igi.org or gia.edu — the most reliable method
Thermal conductivity test: Diamonds conduct heat rapidly — professional testers measure this
Fog test: A real diamond clears instantly; simulants fog for several seconds
Professional loupe inspection: A gemologist can identify inclusions and crystal structure

See our full IGI certificate guide →

Can fake diamonds pass as real?

Direct Answer: Yes — high-quality simulants like moissanite can fool basic diamond testers, but they cannot pass advanced spectroscopic testing or fool an experienced gemologist.

Moissanite passes some thermal conductivity testers due to similar heat dispersion
Advanced multi-tester devices (e.g., GIA iD100) reliably distinguish diamonds from all simulants
A certified diamond with a verifiable IGI or GIA report number eliminates all doubt
Cubic zirconia and moissanite have different refractive indices — detectable under a loupe

Do lab diamonds pass diamond testers?

Direct Answer: Yes — lab-grown diamonds pass all standard diamond testers because they are real diamonds with the same thermal and electrical properties as natural diamonds.

Thermal and electrical conductivity testers: lab diamonds pass identically to natural diamonds
Only advanced spectroscopic equipment can distinguish lab-grown from natural diamonds
Lab-grown diamonds are not simulants — they behave exactly like natural diamonds under all standard testing
IGI certification confirms a diamond is lab-grown on the certificate itself

Is buying diamonds online safe?

Direct Answer: Yes — buying diamonds online is safe when you purchase from a reputable retailer that provides IGI or GIA certification, a clear return policy, and secure payment processing.

Always verify the diamond's certificate at igi.org or gia.edu before purchasing
Look for a minimum 30-day return policy and free return shipping
Ensure the retailer uses SSL-encrypted checkout and established payment methods
DEEVE provides IGI-certified diamonds, free shipping, and a lifetime warranty on every purchase

Learn more in our diamond buying guide →

Diamond FAQ Cluster

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