8 Round Brilliant : Faceting Design Diagram
Information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "8 Round Brilliant"
8 Round Brilliant (QTZ2.JRG)
By Jeff R. Graham
78.5% Light Return
Angles for R.I. = 1.54
57 facets + 16 facets on girdle = 73
8-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.490 T/L = 0.490
P/W = 0.435 C/W = 0.168
H/W = (P+C)/W+0.02 = 0.623
P/H = 0.698 C/H = 0.270
Vol./W^3 = 0.226
Addition # 1 - This is a pretty standard round brilliant, a nice stone in any size and easy to cut. The crown at 42 degrees is as high as you can go and still have good light return in low R.I. materials. Cut in refractive indexes 1.54 to 1.93 (92.2%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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