Penta Dome: Faceting Design Diagram
Successful tips,details and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Penta Dome"0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Penta Dome (DOME34.JRG)
By Jeff R. Graham
82.4% Light Return
Angles for R.I. = 1.62
91 facets + 9 facets on girdle = 100
9-fold, mirror-image symmetry
L/W = 1.015 T/W = 0.274 T/L = 0.270 P/W = 0.403 C/W = 0.370
H/W = (P+C)/W+0.02 = 0.793 P/H = 0.508 C/H = 0.466
Vol./W^3 = 0.279
Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is ideal for lightly saturated materials. It cuts easily and is not difficult. This is very good for pale saturated Afghan Tourmaline.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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