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

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

Deeply Aqua (TOPAZ7.JRG) 5.25 carat seafoam Tourmaline
By Jeff R. Graham
Copyright 1993
82.6% light return
Angles for R.I. = 1.62
81 facets + 12 facets on girdle = 93
2-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.503 T/L = 0.503
P/W = 0.556 C/W = 0.253
H/W = (P+C)/W+0.02 = 0.829
P/H = 0.671 C/H = 0.305
Vol./W^3 = 0.362

Addition # 3 – This design should be cut as a preform to save waste, but it could be cut to center point. I designed this stone for some very light topaz I bought. It is made to be deep to help the color, 1-12cts. Cut in refractive indexes 1.62 to 1.93 (83.7%) 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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