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

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

Topaz Crystal II (TOPAZ2.JRG)
By Jeff R. Graham
Copyright 1993
74% Light Return
Angles for R.I. = 1.62
53 facets + 8 facets on girdle = 61
2-fold, mirror-image symmetry
96 index
L/W = 1.450 T/W = 1.061 T/L = 0.732
P/W = 0.419 C/W = 0.178
H/W = (P+C)/W+0.02 = 0.616
P/H = 0.680 C/H = 0.288
Vol./W^3 = 0.290

Gram Book 1 – Another design for topaz crystal shapes, Champagne or pinkish (Mexican). No point for cleavage breaks, and close to natural shape for low waste. This design makes a nice cut with good return, 1-6cts. (not easy to do!)

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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