Faceting Design Diagram: Brilliant Pear 1.197 – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


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

Brilliant Pear 1.197 (MC34.JRG) 2.97 carat green Afghan Tourmaline
By Jeff R. Graham
Copyright 1999
88.1% Light Return
Angles for R.I. = 1.62
53 facets + 16 facets on girdle = 69
1-fold, mirror-image symmetry
96 index
L/W = 1.197 T/W = 0.642 T/L = 0.537
P/W = 0.428 C/W = 0.163
H/W = (P+C)/W+0.02 = 0.612
P/H = 0.700 C/H = 0.267
Vol./W^3 = 0.227

Addition # 4 – Here is another Brilliant pear, I cut all of them a often, and I like this one in particular. It works well in about any material, it is a little more work than a couple of my others, but a lot less than a normal pear. This works in Topaz and Peridot. Cut this in R.I. 1.62 to 1.76 (89.7%) without changes.


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.