Lab-Grown Diagnostics

Lab-GrownDiamond Certification

Expert certification ensuring clarity on quality, true origin, and growth methodology for the modern, ethical market.

Verify a Certificate Understand the 4Cs →
Two Methods

Types of Lab-Grown Diamonds

UGL provides sophisticated certification specifically tailored for lab-grown diamonds. We don't merely grade — we forensically identify each stone's explicit growth process.

HPHT

High Pressure, High Temperature

Replicates the extreme pressure and heat of the Earth's mantle where natural diamonds form.

  • May produce a subtle yellowish tint from trace nitrogen
  • Used for both gem-quality stones and industrial applications
  • May exhibit metallic flux inclusions — meticulously documented by UGL

CVD

Chemical Vapor Deposition

Diamonds grown layer by layer via carbon-rich plasma gas inside a specialized vacuum chamber.

  • Frequently produces exceptionally colorless (Type IIa) stones
  • Sometimes requires post-growth treatments to improve color
  • Distinct striae detectable only through advanced UGL spectroscopy
Gemologist analyzing a lab-grown diamond under laboratory equipment
What We Assess

Comprehensive Lab-Grown Assessment

Origin Conclusively distinguishing natural genesis from laboratory creation using photoluminescence (PL) spectrometry.
Growth Definitively identifying the stone as HPHT or CVD grown — with full documentation.
Quality Full 4Cs evaluation of cut, color, clarity, and carat weight using identical standards as natural diamonds.
Treatments Uncovering post-growth enhancements used to modify or stabilize stone color.
Why It Matters

Why Lab-Grown Certification Matters

A UGL report verifies a diamond's technological origin and growth type, ensuring ethical jewelers and conscious consumers receive exactly what they expect.

FTC Compliant

Our reports comply fully with FTC guidelines and international gemological nomenclature standards.

Ethical Market

Helps ethical sellers and conscious consumers transact with complete transparency and confidence.

Scientific Clarity

Advanced spectroscopy distinguishes lab-grown origins that the human eye simply cannot detect.

Verify Your Lab-Grown Certificate