Color Spot: Faceting Design Diagram

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

Color Spot (SUN15.JRG)
By Jeff R. Graham
Copyright 2006
93.7% Light Return
Angles for R.I. = 1.54
49 facets + 16 facets on girdle = 65
8-fold, mirror-image symmetry 96 index
L/W = 1.000 T/W = 0.329 T/L = 0.329 P/W = 0.457
C/W = 0.155 H/W = (P+C)/W+0.02 = 0.632 P/H = 0.723 C/H = 0.245 Vol./W^3 = 0.191

PAVILION

CROWN

Addition # 11 - Cut this in refractive indexes 1.54 to 2.14 with no changes. This is fun to cut and is designed for color spots, surrounded by gold. Note: Place the color spot in the center of the pavilion and edge the C2 crown at the color line. It makes interesting effects and the color line can go on the tier line, past it or short of it. The effects will vary depending on where you line the tiers and colors. This works best in an 8mm stone or larger.

Detailed faceting instructions by Jeff Graham available at The Rock Peddler