Checker Star: Faceting Design Diagram
An informational guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Checker Star".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Checker Star (TLINE15.JRG)
By Jeff R. Graham
Copyright 1994
81.3% Light Return
Angles for R.I. = 1.62
49 facets + 12 facets on girdle = 61
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.538 T/L = 0.538
P/W = 0.431 C/W = 0.178
H/W = (P+C)/W+0.02 = 0.628
P/H = 0.685 C/H = 0.283
Vol./W^3 = 0.266
Addition # 1 - This design is a good one to cut if you would like a little challenge, (just a little). It is pretty straight forward to cut and makes a nice stone in any light to medium material, 1/2-6cts. Cut in refractive indexes 1.62 to 1.93 (87.3%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
