Successful tips, details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Pearl".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Pearl (CHECK33.JRG)
By Jeff R. Graham
Copyright 2001
88.3% Light Return
Angles for R.I. = 1.62
53 facets + 17 facets on girdle = 70
1-fold, mirror-image symmetry
96 index
L/W = 1.165 T/W = 0.199 T/L = 0.171
P/W = 0.435 C/W = 0.217
H/W = (P+C)/W+0.02 = 0.672
P/H = 0.647 C/H = 0.324
Vol./W^3 = 0.241
Addition # 6 - I designed this to go with pearls. I wanted something roundish, but not quite round. I originally had Tourmaline in mind, but this works well for stones in refractive indexes 1.73 to 1.93 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Pearl (CHECK33.JRG)
By Jeff R. Graham
Copyright 2001
88.3% Light Return
Angles for R.I. = 1.62
53 facets + 17 facets on girdle = 70
1-fold, mirror-image symmetry
96 index
L/W = 1.165 T/W = 0.199 T/L = 0.171
P/W = 0.435 C/W = 0.217
H/W = (P+C)/W+0.02 = 0.672
P/H = 0.647 C/H = 0.324
Vol./W^3 = 0.241
Addition # 6 - I designed this to go with pearls. I wanted something roundish, but not quite round. I originally had Tourmaline in mind, but this works well for stones in refractive indexes 1.73 to 1.93 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
