Some Characteristics of Lead-Glass-Filled Corundum

Photomicrograph by Christopher. P. Smith, 18x magnification.

One of the most readily available means of identifying the presence of the Pb-glass filler is the obvious blue flash effect that can be seen with a standard jeweler’s loupe or microscope. This effect can be seen on the left.

The research was published in Jewelry News Asia in 2005.

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