This article originally appeared in “Stonechat,” the journal of the UK Facet Cutter’s Guild, in December 1999. We’ve reproduced it here with the permission of the Guild. Although computers and faceting apps have changed tremendously since then, Dr. Washington’s nomogram has more than historical interest. This method for transposing faceting angles from published designs uses no calculations (or computers) at all.
Conversion Methods and Their Shortcomings
One of …
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