Idol Blue: Faceting Design Diagram

Beryl (Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl)

Idol Blue (MC96.JRG)
By Jeff R. Graham
Copyright 2002
87.8% Light Return
Angles for R.I. = 1.56
133 facets + 8 facets on girdle = 141
4-fold, mirror-image symmetry
64 index
L/W = 1.000 T/W = 0.510 T/L = 0.510 P/W = 0.586
C/W = 0.231 H/W = (P+C)/W+0.02 = 0.837 P/H = 0.700 C/H = 0.276 Vol./W^3 = 0.392

PAVILION

CROWN

Addition # 12 - Got a large piece of Beryl? This cuts easier than it looks. This obviously needs to be a large stone. Notice that the angles are not far apart on P5 and P6, just cut them to meet.

Detailed faceting instructions by Jeff Graham available at The Rock Peddler