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