Quell: Faceting Design Diagram

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

Quell (SUN19.JRG)
By Jeff R. Graham
Copyright 2006
77.4% Light Return
Angles for R.I. = 1.54
73 facets + 16 facets on girdle = 89
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.467 T/L = 0.467 P/W = 0.548
C/W = 0.148 H/W = (P+C)/W+0.02 = 0.716 P/H = 0.765 C/H = 0.207 Vol./W^3 = 0.270

PAVILION

CROWN

Addition # 11 - Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed to be a deeper RB. It works well in any colored material and is particularly good in Beryl. This is also nice in large yellow Sunstone. Note: The girdle can be cut in first and the P1 cut to meet so that center point is not needed and it saves rough.

Detailed faceting instructions by Jeff Graham available at The Rock Peddler