Hello,
please advise me what diagrams to use for dark stones. Possibly a link to information.
Thank you
Zolo
Hi Zoltan,
it depends on how dark the stone is. I have some Kerala Garnets that are so saturated they look black when cut even though you can see light through them, cut as a brilliant they are black. I’m going to try 4 large reflector facets on the pavillion cut at 2degrees above the critical angle and a shallow crown that is mostly table. This is to minimise the distance light has to travel through the stone. If that doesn’t work, the only cut for them is a rose cut with no pavillion, it won’t matter.
but ordinary saturated garnets benefit from a low crown and pavillion with large reflector facets.
if you can get it from the net, Jeff Graham’s Lighthouse Cut was designed for dark garnet.
if you are cutting closed C tourmaline, chose a tourmaline cut to minimise reflection along the C axis which will darken the stone
regards
Gordon
Privacy policy Website terms and conditions
Copyright 2015 Australian Facetors' Guild Limited • Site by Highland Creative