Diamond: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Diamond".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Diamond (B40.JRG)
By Jeff R. Graham
Copyright 2001
84.3% Light Return
Angles for R.I. = 1.62
61 facets + 8 facets on girdle = 69
2-fold, mirror-image symmetry
96 index
L/W = 1.175 T/W = 0.634 T/L = 0.540
P/W = 0.480 C/W = 0.192
H/W = (P+C)/W+0.02 = 0.692
P/H = 0.694 C/H = 0.277
Vol./W^3 = 0.272
Addition # 5 - Cut in R.I. 1.62 through 1.76 with no changes… This is fast to cut and makes an unusual stone. I like it in almost any material.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
