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Gemological History & Commercial Grading Breakdown

EGL Diamond Certification.
EGL USA vs International Standards Explained.

Founded in 1974 in Belgium by Guy Margel, the European Gemological Laboratory (EGL) introduced important innovations to diamond grading, such as cut proportions and the SI3 clarity category. Discover the critical distinctions between independently operated EGL USA and legacy overseas branches.

EGL USA vs International All Certification Labs
Independent EGL USA Standards Pioneer of Diamond Proportions Value-Driven Commercial Market
EGL Diamond Certification Report
EGL Certification
COMMERCIAL TRADE GUIDE
Est. 1974
✦ Essential Consumer Knowledge ✦

EGL USA vs. EGL International: What You Must Know

In the diamond industry, not all EGL reports are created equal. It is vital to understand the structural difference between EGL USA and legacy EGL International franchises:

Independent Entity

EGL USA (New York, LA)

Operating under independent American ownership, EGL USA maintains separate management, dedicated grading laboratories, and stricter quality control protocols than overseas franchises.

  • Maintains high gemological standards within the United States.
  • Provides micro-laser inscription and online report lookup.
  • Frequently chosen by high-volume commercial jewelers.
Legacy Franchises

EGL International (Historical)

Historically, certain franchised international locations used looser color and clarity standards compared to GIA and IGI, resulting in a diamond graded G/VS1 sometimes comparing to an I/SI1 on strict scales.

  • Led to the 2014 Rappaport Trading Network ban of EGL International reports.
  • Always compare grades carefully if looking at vintage or secondary market stones.
  • New Origin Diamonds recommends IGI or GIA for prime liquidity.
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