(This article originally appeared in ‘Stonechat’, the journal of the UK Facet Cutter’s Guild, in December 1999, and is reproduced here with the permission of the Guild)
One of the first problems encountered by the beginner is the conversion of published faceting designs to a form suitable for materials other than quartz. Virtually all published designs use angles which have been optimized for quartz, and since other materials have different refractive indices and critical angles, they require the facets to …
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