Tess’s Pentagram: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Tess's Pentagram"0
Tess's Pentagram (MC71.JRG)
By Jeff R. Graham
82.6% Light Return
Angles for R.I. = 1.54
23 facets + 5 facets on girdle = 28
1-fold, mirror-image symmetry
L/W = 1.282 T/W = 0.820 T/L = 0.640
P/W = 0.396 C/W = 0.175
H/W = (P+C)/W+0.02 = 0.591
P/H = 0.670 C/H = 0.296
Vol./W^3 = 0.256
Addition # 7 - This is not all that tough to cut, although it is not really meet point. Cut a L/W=1.282 preform, which is why I have you cut the girdle first. Cut P1 to the length you think it should be depending on the rough. Then alternate P2(G),P3(G)to get it to the L/W. Notice that by doing it this way it will set the outline shape. If you are off a little, it is not a problem, you may need to tweak the crown a little. This works in Beryl.....
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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