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The market is seeing a spate of green diamonds coming back from grading labs as treated or “undetermined,” says Thomas Hainschwang, cofounder of GGTL Laboratories. Plus: synthetic diamonds, trends in grading, and the science of identifying origin.
By Rapaport3.2
1818 ratings
The market is seeing a spate of green diamonds coming back from grading labs as treated or “undetermined,” says Thomas Hainschwang, cofounder of GGTL Laboratories. Plus: synthetic diamonds, trends in grading, and the science of identifying origin.

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