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On his second appearance, Thomas Hainschwang of GGTL Laboratories discusses underqualified gem labs, the latest developments in synthetics, and why fluorescent diamonds have a bad name.
By Rapaport3.2
1818 ratings
On his second appearance, Thomas Hainschwang of GGTL Laboratories discusses underqualified gem labs, the latest developments in synthetics, and why fluorescent diamonds have a bad name.

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