How do I know if a diamond is natural?—or if it’s lab-grown?

It takes a multi-pronged approach to determine if a diamond is natural or earth-mined. One can review the diamond's certificate, check the girdle laser inscription, examine the internal characteristics, and use tests.

At Lucce, we proudly offer both natural earth-mined diamonds and premium lab-grown diamonds. Each option is beautiful, ethically sourced, and certified—but they differ in how they’re formed and in their symbolism.

This guide will help you identify key markers of authenticity—ensuring confidence and clarity in your decision.

1. Review the Diamond’s Grading Certificate

The most reliable way to verify a diamond’s origin is through a certificate from a trusted gemological laboratory, such as:

• GIA (Gemological Institute of America)
• IGI (International Gemological Insititute)

These certificates will explicitly state whether a diamond is natural or lab-grown, along with the 4Cs: Cut, Color, Clarity, and Carat weight.

Organizations such as CanadaMark and ForeverMark also certify eligible diamonds for their exact mine origin which adds confidence when assessing if a diamond is natural.

At Lucce, whether you're choosing a natural or lab-grown diamond, each piece comes with complete certification from internationally recognized laboratories.

2. Check for Laser Inscriptions on the Girdle

Most certified diamonds have a microscopic laser inscription on the girdle—a unique number that links directly to the diamond’s certificate.

You can confirm whether a diamond is natural or lab-grown by matching this code to its official report.

Lucce ensures transparency in all diamond offerings. Our natural and lab-grown diamonds both come with laser inscriptions for verification.

3. Examine Internal Characteristics Under Magnification

Natural diamonds often display internal traits called inclusions, formed during their development deep within the Earth. These may include:

• Mineral crystals
• Feathers or pinpoints
• Natural graining patterns

Lab-grown diamonds, on the other hand, may contain features specific to their growth method, such as metallic inclusions (HPHT) or growth striations (CVD). These are natural outcomes of a different formation process.

Lucce’s expert gemologists use advanced magnification tools to inspect every diamond—ensuring quality and full transparency, whichever option you choose.

4. Consider Fluorescence Reactions

Some natural diamonds exhibit a blue fluorescence under UV light, a trait formed in nature. Lab-grown diamonds may also fluoresce, but the patterns and colors can differ depending on their formation process.

While not a sole determining factor, fluorescence adds another layer of insight when considered with certification and gemological review.

5. Use a Diamond Tester + Magnet Combination

Diamond testers can detect thermal conductivity, which helps differentiate diamonds from simulants. However, since both natural and lab-grown diamonds have high conductivity, this tool won’t distinguish origin.

In some cases, a magnet test can detect metallic traces in HPHT lab-grown diamond. Natural diamonds are never magnetic.

Professional gem labs use these tests alongside certification and visual analysis to ensure complete accuracy.

Why Diamond Origin Matters—And Why It’s Personal

Choosing between a natural diamond and a lab-grown diamond isn’t about which one is “better.” It’s about what feels right for you.

• Natural Diamonds are rare, formed over billions of years, and valued for their historical and geological significance. Many couples choose them for their heirloom appeal and traditional symbolism.
• Lab-Grown Diamonds are identical in chemical structure, offer exceptional brilliance, and provide a more accessible price point for those seeking modern luxury and sustainability.

At Lucce, we believe in informed choice. That’s why we offer both options—each one certified, stunning, and worthy of your once-in-a-lifetime moment.

Lucce’s Assurance of Authenticity and Quality

Whether you choose a natural or lab-grown diamond, Lucce guarantees:

• Certification from the GIA or IGI
• Ethical sourcing and transparent origin
• Expert gemologist inspection
• Superior craftsmanship and design integrity

We stand by every piece—because what matters most is that you’re confident in the diamond that marks your forever.

Summary: How to Tell if a Diamond is Natural

Verification Method	What to Look For
Grading Certificate	GIA or IGI stating "Natural Diamond"
Laser Inscription	Unique ID visible under magnification
Inclusions	Natural growth patterns (e.g., feathers, crystals)
UV Fluorescence	Subtle blue glow in some natural diamonds
Magnet Test	Natural diamonds are not magnetic

Discover the Diamond That’s Right for You

In love—and in diamonds—there is no one-size-fits-all.

Whether you're drawn to the timeless formation of a natural diamond or the modern brilliance of a lab-grown diamond, Lucce offers only the finest, most thoughtfully curated options in the Philippines.