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Emeralds typically contain numerous fractures when recovered, and yet consumers have high expectations for their clarity as well as color. As a result, the overwhelming majority of emeralds on the market today have undergone some form of clarity enhancement. The proliferation of filler substances in recent years has raised widespread concern in the trade about their identity and durability. The lead article in this issue reviews the history of emerald clarity enhancement and the current situation in the trade. It then focuses on possible methods of distinguishing among different clarity-enhancement substances. Photo © Harold & Erica Van Pelt--Photographers, Los Angeles, California. |
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