Spur: Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Spur".
Zircon (Hyacinth, Starlite)
Spur (ZIRCON15.JRG)
By Jeff R. Graham
Copyright 1998
85% Light Return
Angles for R.I. = 1.98
85 facets + 12 facets on girdle = 97
6-fold, mirror-image symmetry
96 index
L/W = 1.065 T/W = 0.514 T/L = 0.483
P/W = 0.400 C/W = 0.193
H/W = (P+C)/W+0.02 = 0.613
P/H = 0.653 C/H = 0.315
Vol./W^3 = 0.244
Addition # 3 - This design cuts medium easy the crown meet can be a little hard. Cut in good medium color (I like honey) Zircon. It has nice sparkle to it because of the P5 & C4 tiers, 1-12cts.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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