DiamondNotes

AGS Plans Cut Grades for Fancy Shapes The American Gem Society lab is known for its round brilliant cut grades, and now it plans to offer certs for fancy shapes as well. At the recent AGS Conclave in New Orleans, the lab’s board authorized director Peter Yantzer to develop a system for grading fancy-shaped diamond cuts. “Our goal is to develop an AGS '0’ [the highest cut grade] for fancies,” Yantzer says. But he concedes there are virtually no precedents for what he’s doing. “I don’t know how we’re going to do it,” he says. “I have some ideas. We will look at the tens of thousands of stones in our database and try to determine guidelines. It’s a huge project, and it’ll be controversial. But I’m confident we can do it.” Yantzer notes that the few fancy-shape cut systems in the past have measured the length-to-width ratio—an approach he wants to avoid. I
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