Labs You Can Trust

North American Diamond Brokers only sells loose diamonds that are accompanied by a grading report issued from the world’s most renowned gemological laboratories: The Gemological Institute of America and the American Gem Society. Our loose diamond wholesalers are trusted providers in purchasing discount jewelry for promise rings, wedding bands, and loose diamond products.


GIA-LOGOThe Gemological Institute of America (GIA) pioneered the loose diamond wholesaler grading system used by labs all over the world in 1931.

The GIA Laboratory continues to be the world’s most trusted name in diamond wholesale grading, pearl and gemstone identification, where an expert team of graders and gemologists service the needs of international manufacturers and traders.

A truly independent entity, GIA is not affiliated with any retailer, diamond wholesaler or manufacturer. Therefore, industry professionals and consumers consider GIA reports as the benchmark for impartial assessment and certification for purchasing jewelry.

Every gemstone and loose diamond submitted to GIA is tested at multiple steps during the grading process before the public can purchase the jewelry. A global database captures hundreds of data points for each gem during the grading process. This database is a permanent repository of information on every GIA-graded diamond wholesale and also serves as a valuable resource to track lost diamonds.


AGS-logoThe American Gem Society (AGS) is a jewelry trade organization dedicated to consumer protection. AGS prides itself in providing valuable help in educating potential customers and guiding them to trustworthy jewelers. AGS is an acclaimed innovator due to the extensive research and development invested into being devoted to the cause of consumer protection.

Founded jointly by several leading jewelers and gemologists in 1934, AGS is a not-for-profit trade association. It comprises leading jewelers, suppliers, and jewelry designers who craft promise rings, wedding bands, and other loose diamond wholesale products.


Consumers, jewelry retailers, and loose diamond wholesalers respect both GIA and AGS for their unrivaled accuracy and integrity in every aspect of grading diamonds and gemstones. When you purchase discount jewelry or a loose diamond at our jewelry stores with a GIA or AGS grading report you can be confident you are receiving the highest level of grading accuracy.