Snowflake: Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Snowflake"0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff R. Graham
75.9% Light Return
Angles for R.I. = 1.62
169 facets + 16 facets on girdle = 185
8-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.440 T/L = 0.440
P/W = 0.441 C/W = 0.172
H/W = (P+C)/W+0.02 = 0.633
P/H = 0.697 C/H = 0.272
Vol./W^3 = 0.218
Addition # 1 - This design makes a nice stone in light material and because of the number of facets I cut it in a large size. It's reflection is higher than it ray traces and takes some work to cut. Cut in refractive indexes 1.62 to 1.93 (89.1%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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