Speed Spike: Faceting Design Diagram
Helpful tips, details and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Speed Spike".
Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Speed Spike (MIR56.JRG)
By Jeff R. Graham
Copyright 2005
85.3% Light Return
Angles for R.I. = 1.54
37 facets + 9 facets on girdle = 46
3-fold, mirror-image symmetry
96 index
L/W = 1.004 T/W = 0.290 T/L = 0.289 P/W = 0.398
C/W = 0.191 H/W = (P+C)/W+0.02 = 0.609 P/H = 0.654 C/H = 0.313 Vol./W^3 = 0.184
PAVILION
CROWN
Addition # 10 - This cuts pretty easy and makes a nice stone. Cut in refractive indexes 1.54 to 2.14 with no changes. This design is ideal for 1 to 2 carat earrings in about any light to medium saturation.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
