About Us
Welcome to USGL – The United States Gemological Laboratory.
Authenticity in Every Facet
Welcome to USGL – the United States Gemological Laboratory. USGL is a leading certification institute specializing in the valuation and certification of natural and lab-grown diamond jewelry, based on cutting-edge technology combined with expertise in gemology to ensure that every valuation provides comprehensive assurance in quality, authenticity, and responsible sources.
With transparency, dependability, and non-biased certification, we empower our consumers and retailers, enabling them to make informed decisions in a fast-changing world of diamonds.
Our mission is to certify a treasured heirloom or an awe-inspiring piece of jewelry for you as a trusted partner in the journey of diamond excellence.
All our laboratory gemologists and metallurgists possess advanced scientific and gemological education with certified experience and maintain absolute integrity. Our state-of-the-art laboratories are equipped with the most sophisticated, robust instruments, including the latest analysis techniques used for any diamond’s authenticity and any treatment as certified by the most scientific, objective, and reproducible methods possible. This guarantees a high level of accuracy and reliability in every analysis and report we publish.


Why Jewelry Certifications from USGL?
USGL certification for jewelry will benefit both consumers and retailers alike in the diamond market. Accreditation offers an unbiased assessment of diamond’s cut, color, clarity, and carat weight to provide assurance that buyers get what they pay for. Amid the emergence of lab-grown diamonds, reliability in accreditation will be a benchmark in trying to differentiate natural from lab-grown jewelry, but above all, it protects the interests of consumers. Detailed reports by USGL will increase trust and transparency, so customers can make the right decisions with accurate information. To retailers, it is an advantage that products from USGL-certified businesses would be purchased by customers who most probably want to get jewelry only from authenticating dealers. That is why USGL certification protects investments, promotes ethical conduct in the industry, and further contributes to a more knowledgeable and responsible marketplace.

Excellence As A Prima Facie
Achieving excellence has been the prima facie of every firm in the industry. Striving for excellence in multitude segments of diamond jewelry certification has made us work with integrity, precision & unparallel dedication, thereby garnering fruitful results. At USGL, the pursuit of excellence has been not only a goal but a journey that has brought forth remarkable achievements and progression in gemology, instruments, and educational services, benefiting the trade by multiple folds.
Accuracy As The Yardstick
Accuracy forms the backbone of reliability and trust within modern-day gemology. USGL is well versed with the challenges that determine precision, which include state-of-the-art measuring techniques, sophisticated high-performance technologies, as well as exhaustive methodologies. To achieve and surpass standard industry requirements, we constantly refine our processes and invest in efficient analytical equipment, thus ensuring that appraisals performed by us are not only accurate but also of the highest quality. With our guarantee of precision and accuracy in every diamond and jewelry report we make, you will get trustworthy, reliable information on your most valuable assets.


Unmatched & Superlative Quality
Quality is that which separates any given firm from the competition and defines the reputation as well as the long-term success of it. Quality at USGL means not only achieving compliance but also the level of excellence that compels us to consistently exceed customer expectations. Every single aspect of our operation is branded with a deep commitment to quality-from the precision and accuracy in our diamond and jewelry reports to transparency and reliability in services.
This focus on delivering exceptional results both ensures that our clients receive the most accurate and trustworthy assessments as well as fostering greater customer satisfaction.