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

Brilliant Pear Checker (CHECK28.JRG)
By Jeff R. Graham
Copyright 2001
80.6% Light Return
Angles for R.I. = 1.62
58 facets + 13 facets on girdle = 71
1-fold, mirror-image symmetry
96 index
L/W = 1.207 T/W = 0.281 T/L = 0.233
P/W = 0.451 C/W = 0.217
H/W = (P+C)/W+0.02 = 0.688
P/H = 0.655 C/H = 0.316
Vol./W^3 = 0.245

Addition # 6 - This is not hard, especially if you have cut my “Brilliant Pear” design(s) first. However, it can be a little tricky to cut the crown in. This works in refractive indexes 1.62 to 1.93 with no changes.

 

 

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