Inca 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 "Inca Dome"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Inca Dome (DOME21.JRG)
By Jeff R. Graham
Copyright 2007
85.6% Light Return
Angles for R.I. = 1.62
81 facets + 16 facets on girdle = 97
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.277 T/L = 0.277 P/W = 0.405 C/W = 0.319
H/W = (P+C)/W+0.02 = 0.744 P/H = 0.544 C/H = 0.429
Vol./W^3 = 0.247
PAVILION
CROWN
Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is nice and works well in light to mediumly saturated materials. I like it in mint and fancy colored Garnets as well.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
