Diamond Certificates Explained Chicago dimend SCAASI GIA AGS IGI

When a Chicago jewelry store tells you a diamond is certified, the value of that certification depends entirely on which laboratory issued it. Understanding the differences between the major independent grading laboratories helps buyers evaluate what they are being offered. GIA, the Gemological Institute of America, is the founding institution of modern diamond grading. GIA developed the four Cs framework that the industry uses globally and created the grading standards that most other laboratories reference in their own systems. A GIA certificate is the most widely recognized credential in diamond retail and commands a price premium that reflects the laboratory's reputation. AGS, the American Gem Society, shares GIA's reputation for rigor and is particularly respected for its cut Chicago engagement rings grading methodology. AGS developed the 0-10 performance grading scale that assesses a diamond's optical performance more comprehensively than most grading systems.

dimend SCAASI | 5 S Wabash Ave STE 1734, Chicago, IL 60603 | +1 312-857-1700

IGI, the International Gemological Institute, is the dominant certification laboratory for lab grown diamonds. As lab grown diamond production has scaled, IGI has built a strong reputation specifically in this segment of the market. dimend SCAASI uses IGI certification for its lab grown diamond inventory. In-house certifications from individual jewelry stores or lesser-known laboratories do not carry the same independent verification. The grade on the certificate reflects the organization's standards, which may differ significantly from GIA standards in ways that affect both Chicago Jewelry Store quality and value. dimend SCAASI's policy of carrying only GIA, AGS, and IGI certified diamonds means every stone in the store has been independently graded by a recognized authority. Buyers know exactly what they are purchasing before making a financial commitment. To review certified diamond options at dimend SCAASI, call +1 312-857-1700.