Channel Pattern: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Channel Pattern".
Topaz (Swiss, Electric, London Blue, Imperial, White, Yellow, Pink, Champange)
Channel Pattern (TOPAZ19.JRG)
By Jeff R. Graham
Copyright 1998
79% Light Return
Angles for R.I. = 1.62
101 facets + 8 facets on girdle = 109
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.497 T/L = 0.497
P/W = 0.440 C/W = 0.199
H/W = (P+C)/W+0.02 = 0.659
P/H = 0.668 C/H = 0.302
Vol./W^3 = 0.238
Addition # 3 - This can be a little tricky to cut, the steps take a lot of lining up. I would cut this in a larger size, it works well in about any material. Also this is a good cut for "c" axis Tourmaline, 1-18cts. Cut in refractive indexes 1.62 to 1.93 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
