Contort: Faceting Design Diagram

Sunstone (Feldspar, Bytonite, Labradorite, Spectrolite, Orthoclase)

Contort (SUN42.JRG)
By Jeff R. Graham
Copyright 2006
81.8% Light Return
Angles for R.I. = 1.54
27 facets + 6 facets on girdle = 33
2-fold, mirror-image symmetry
96 index
L/W = 2.012 T/W = 0.576 T/L = 0.287 P/W = 0.456
C/W = 0.242 H/W = (P+C)/W+0.02 = 0.718 P/H = 0.635 C/H = 0.337 Vol./W^3 = 0.566

PAVILION

CROWN

Addition # 11 - Cut in refractive indexes 1.54 to 2.14 with no changes. Note: Cut the L/W and then just cut the P3(G) until they point. This works well in colored material and watermelon. The points can be fragile so care must be taken.

Detailed faceting instructions by Jeff Graham available at The Rock Peddler