Faceting Design Diagram: Daisy Illusions – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


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

Daisy Illusions (MIR10.JRG)
By Jeff R. Graham
Copyright 2004
93.1% Light Return
Angles for R.I. = 1.62
43 facets + 6 facets on girdle = 49
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.148 T/L = 0.128
P/W = 0.405 C/W = 0.208
H/W = (P+C)/W+0.02 = 0.633
P/H = 0.639 C/H = 0.329
Vol./W^3 = 0.209

Addition # 9 – Do not bother cutting a table on small stones (under 10mm). A table is helpful on large stones. Cut in refractive indexes 1.62 to 2.14 with no changes. This design is very interesting in Zircon, particularly light colored ones. Also try it in Garnets.


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.