Glitter Roval: 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 "Glitter Roval".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Glitter Roval (MC97.JRG)
By Jeff R. Graham
Copyright 2006
90% Light Return
Angles for R.I. = 1.62
121 facets + 10 facets on girdle = 131
2-fold, mirror-image symmetry
96 index
L/W = 1.414 T/W = 0.475 T/L = 0.336 P/W = 0.598
C/W = 0.281 H/W = (P+C)/W+0.02 = 0.898 P/H = 0.665 C/H = 0.313 Vol./W^3 = 0.529
PAVILION
CROWN
Addition # 12 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is very nice and cuts well in about any light to mediumly saturated material. This is not a good design for a beginner. It works best in a large stone.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
