Faceting Design Diagram: Mig – Topaz – Swiss, Electric, London Blue, Imperial, White, Yellow, Pink, Purple, Champange


Topaz (Swiss, Electric, London Blue, Imperial, White, Yellow, Pink, Champange)

Mig (TOPAZ20.JRG)
By Jeff R. Graham
Copyright 1998
78% Light Return
Angles for R.I. = 1.62
76 facets + 12 facets on girdle = 88
3-fold, mirror-image symmetry
96 index
L/W = 1.073 T/W = 0.577 T/L = 0.537
P/W = 0.468 C/W = 0.188
H/W = (P+C)/W+0.02 = 0.677
P/H = 0.692 C/H = 0.278
Vol./W^3 = 0.245

Addition # 3 – This can be hard to follow because of the sym changes. Once you cut one, it’s not very hard. This design has a very unusual look to it, I like it in Topaz. Cut in any material, 2-18cts. Cut in refractive indexes 1.62 to 2.14 (84.1) 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.