EGL USA is one of the largest and oldest independent gemological institutions focusing on gemstone certification and research. Originally part of an international network founded in Europe in 1974, EGL USA opened its first U.S. lab in the heart of New York's international diamond and jewelry district in 1977.


In 1999 EGL USA initiated a Research Department to respond to the changing needs of the jewelry industry. It is one of only a few labs worldwide doing advanced research in gemology.

Certificates & Grading Reports

• Diamond Reports
• Full Page Documents
• Mini-size Documents
• Colored Gem / Pearl Reports
• Full Page Documents
• Mini-size Documents
• Laser Inscription
• Jewelry Webguard™ Certificate

• EGL USA - New York
• 6 West 48th Street,
• New York, NY 10036
• Phone: (212) 730-7380 | Fax: (212) 842-5180
• Email Id: egl@eglusa.com | Web Link: www.eglusa.com
• EGL USA - Los Angeles
• 550 South Hill, Suite 840,
• Los Angeles, CA 90013
• Phone: (877) 893-8593 | Fax: (213) 534-2224
• Email Id: egl@eglusa.com | Web Link: www.eglusa.com

GIA is considered the world’s most trusted name in diamond grading and gemstone identification. Since 1931, GIA has been dedicated to ensuring the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science, and professionalism. It is the corporate birthplace of the International Diamond Grading System™ and the creator of the famous 4Cs of diamond value – color, clarity, cut, and carat weight.

GIA’s D-to-Z color-grading scale and Flawless-to-I3 clarity-grading scale are recognized by gem and jewelry professionals everywhere. And, by extension, the GIA Diamond Grading Report, Diamond Dossier®, and Gemological Identification Report are considered the world’s premier gemological credentials.

With laboratories in New York, California, Bangkok, an additional research facility in Antwerp, 14 campuses, and more than 1,100 employees worldwide, the Institute’s diamond graders, researchers, and educators are regarded, collectively, as the world’s foremost authority in gemology. And together, they carry on GIA’s proud tradition of research, discovery, and education.

Certificates & Grading Reports

• GIA Diamond Grading Report with Cut Grade
• GIA Diamond Grading Report
• GIA Diamond Dossier with Cut Grade
• GIA Diamond Dossier
• GIA Gem Identification Report

IGI is the largest independent gem certification and appraisal institute with operations worldwide. Over the past three decades, IGI's commitment to quality services, extensive experience, expertise and its longstanding reputation for reliability and integrity have made IGI the standard of excellence in gemology and fine jewelry evaluation worldwide.

IGI, the oldest institute of its kind in Antwerp, was founded in 1975 and along with its sister laboratories, is one of the leading gemological institutions worldwide. IGI is also the only international certification lab wholly owned and controlled by one central governing body, which ensures consistency in IGI reports across the globe. In adhering to the one internationally accepted system for diamond grading, IGI offers its clients peace of mind.

For over 30 years, IGI has provided the fine jewelry community and consumers with a broad range of services including: independent diamond grading reports, colored stone reports, identification and appraisal reports, diamond authentication and attestation of origin, laser inscription services, and diamond and colored stone courses offered through IGI's School of Gemology.

Today, IGI issues more than one million reports per year, which is notable considering that 10 years ago only diamond dealers were using gemological reports. Consumers are now more demanding and quality conscious about the products they buy and as such, the majority of quality gem and jewelry items are sold with gemological reports.

Certificates & Grading Reports

• Identification Report
• Appraisal Report
• Certificate of Authenticity
• Jewelry Summation
• Attestation of Origin

The AGS Laboratories is the world’s premier diamond grading laboratory for diamond cut, the premier laboratory to offer a diamond cut grade for fancy shapes such as princess cut and emerald cut, and the foremost diamond grading laboratory created to protect the consumer. AGS Laboratories diamond grading reports offer an easy-to-read grading scale that provides a simple basis for comparison to other diamond reports. The AGS Laboratories Diamond Reports provide you with all the information you need to make the best possible buying decision.

The AGS Laboratories have provided high-quality diamond grading services since 1996. AGS Laboratories has maintained its reputation as an industry leader through its innovative approaches to diamond grading and consistent adherence to the American Gem Society’s standards and ethics of consumer protection.

Certificates & Grading Reports

• Diamond Quality™ Analysis
• Diamond Quality™ Document
• Diamond Quality™ Report
• Diamond Consultation™
• Laser Inscription