Faceting Design Diagram: Lavender Storm – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


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

Lavender Storm (MIR24.JRG)
By Jeff R. Graham
Copyright 2004
89.5% Light Return
Angles for R.I. = 1.62
41 facets + 12 facets on girdle = 53
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.292 T/L = 0.292
P/W = 0.445 C/W = 0.228
H/W = (P+C)/W+0.02 = 0.693
P/H = 0.642 C/H = 0.329
Vol./W^3 = 0.248

Addition # 9 – This is nice in any material and has a lot of sparkle. Cut this in about any size and you will be amazed at how much life the design has. I tend to like light to medium saturated colors for this design. It does work well in Garnet. Cut in refractive indexes 1.54 to 2.14 with no 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.