Thor’s 1.225: 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 "Thor's 1.225".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Thor's 1.225 (CHECK80.JRG)
By Jeff R. Graham
88.6% Light Return
Angles for R.I. = 1.62
45 facets + 17 facets on girdle = 62
1-fold, mirror-image symmetry
L/W = 1.225 T/W = 0.275 T/L = 0.224
P/W = 0.428 C/W = 0.192
H/W = (P+C)/W+0.02 = 0.640
P/H = 0.669 C/H = 0.300
Vol./W^3 = 0.228
Addition # 8 - This takes a lot of cutting but is worth the trouble and is very nice in about any material. Cut this in refractive indexes 1.62 to 1.93 with no changes. Be sure the pavilion point is centered over the dop when cutting the pavilion.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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