WebServices and Reports. Lab Services; Grading Reports; GSI Research & Education; Education. Colored Stone Professional; My GSI. Verify Your Report; Virtual Vault; Trade Client Portal; FAQ; Inventory Integrity. Detection and Disclosure; Research. Gemology News; About Jewelry and More; Estore WebJul 7, 2024 · Whether your diamond has a cut grade or not, here’s how to check your diamond for cut quality factors: This trio of diamonds demonstrates why cut is important. These diamonds have cut grades—Excellent, Good, Poor—from left to right. Which has the most brightness and the most attractive pattern? Photo: Kevin Schumacher and GIA
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