Faceting Design Diagram: Checker Star – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


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