Little Block: 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 "Little Block".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Little Block (TLINE35.JRG)
By Jeff R. Graham
84.4% Light Return
Angles for R.I. = 1.62
45 facets + 8 facets on girdle = 53
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.356 T/L = 0.356
P/W = 0.423 C/W = 0.297
H/W = (P+C)/W+0.02 = 0.740
P/H = 0.572 C/H = 0.401
Vol./W^3 = 0.301
Addition # 1 - This design is for those chunky pieces of rough that are really too square to cut a round out of. I designed it for that light pastel Afghan Tourmaline that is available once and a while (it will help darken color). It cuts easy and the crown facets can be brought down a few degrees, if needed, 1/2-8cts (finished). Cut in refractive indexes 1.62 to 1.76 with no changes. This works best in light colored material.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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