Ideal and Excellent Cut Reports

The ideal cut of a round brilliant cut diamond is striking in its precision and bears an unmistakable witness to the skill and care of the cutter. Diamonds meeting these criteria have less weight retention from symmetrical rough, and require extra time and care to produce the high quality finish.

Diamonds with this cut grade are rare and normally cost more than stones of comparable weight, color and clarity. An ideal/excellent cut diamond is polished to such perfection that the balance between brillance and dispersion is superlative. The best combination of angles and proportion percentages as well as the highest quality of polish and symmetry allow for optimal light return.

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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 reliablilty and integrity have made IGI the standard of excellence in gemology and fine jewelry evaluation worldwide. Learn more