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


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

Blue Star (TOPAZ3.JRG) 1.69 carats Guerro Topaz
By Jeff R. Graham
Copyright 1993
82.5% Light Return
Angles for R.I. = 1.62
67 facets + 6 facets on girdle = 73
6-fold, mirror-image symmetry
96 index L/W = 1.155 T/W = 0.562 T/L = 0.486
P/W = 0.459 C/W = 0.213
H/W = (P+C)/W+0.02 = 0.692
P/H = 0.663 C/H = 0.308
Vol./W^3 = 0.279

Gram Book 1 – Here is a good design for Topaz with sparkle that is easy to cut. It makes good earrings especially in blue material, 1/2-6cts. Cut in refractive index 1.62 to 2.14 (87.9%) with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

About the author
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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