Faceting Design Diagram: Ups “E” Daisy – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Ups “E” Daisy (TLINE33.JRG) 2.77 carat peach Tourmaline
By Jeff R. Graham
Copyright 1996
81.4% Light Return
Angles for R.I. = 1.62
105 facets + 8 facets on girdle = 113
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.509 T/L = 0.509
P/W = 0.465 C/W = 0.204
H/W = (P+C)/W+0.02 = 0.689
P/H = 0.674 C/H = 0.297
Vol./W^3 = 0.262

Addition # 1 – This design cuts easy, however it should be a larger stone. Watch the meets on P4 so that the P5, P6 look even, 2-12cts. Cut in refractive indexes 1.62 to 1.93 (90.6%) with no changes. I prefer this in light to medium colored materials.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.