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10-07-2009, 06:37 PM
Thread: Has Anyone Ever Honed With a Lydian Stone?
by A_S- Replies
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Has Anyone Ever Honed With a Lydian Stone?
In his 1890 Geological Survey, Griswold refers to the Lydian Stone, which is primarily used as a touchstone for testing the purity and quality of precious metals. However, in describing the stone, it...
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