Why JewelersChoose UGL
Advanced lab capabilities, accurate reporting, and unwavering integrity — setting us distinctly apart.
Five Pillars of the UGL Advantage
Selecting an independent grading laboratory is a consequential decision. Here is exactly what UGL offers that others cannot.
Advanced Laboratory Infrastructure
We invest heavily in the most sophisticated analytic technology on the global market. Our state-of-the-art equipment encompasses calibrated Fourier Transform Infrared (FTIR) spectrometers, advanced Raman spectroscopic arrays, and cutting-edge UV-Vis spectrophotometers. This ensures zero margin for error during complex evaluations such as synthetic origin detection or beryllium treatment diffusion.
Completely Unbiased, Accurate Reports
A UGL certification represents clear, science-backed insight. Our unique "blind grading" protocol systematically obscures all client identifying data from our senior diamond grading teams. This guarantees an utterly unbiased, objective workflow where a diamond is graded strictly on its physical and optical merits — never on who submitted it.
Trusted Global Appraisals
Our expansive appraisal documents are recognized globally. They provide trusted, professional financial valuations explicitly tailored for insurance underwriting, private retail resale, high-value estate planning, and personal portfolio documentation. Our certificates are accepted in 95+ countries.
Transparent, Secure Processes
From the moment a high-value parcel enters our facility to its finalized departure, we maintain strict logistical tracking. Internal video monitoring, specialized biometric vaults, and rigorous chain-of-custody protocols provide absolute security for your assets at every stage.
Client-Focused Accessibility
We prioritize delivering tailored solutions. Whether evaluating a singular heirloom engagement ring for an individual or consistently processing thousands of carats weekly for a commercial wholesaler, UGL provides a seamless, highly communicative, and rapid-turnaround experience.
Everything You Need, In One Lab
UGL is the only lab you need — for every stone, every occasion, every market.
Natural Diamonds
Full 4Cs grading to international standards.
Lab-Grown Diamonds
HPHT/CVD identification with spectroscopy.
Colored Gemstones
Origin, treatments, and species identification.
Jewelry Valuation
Insurance and resale appraisals globally trusted.