Mars Dome: Faceting Design Diagram

Danburite (Clear, Yellow, Pink)

Mars Dome (CHECK8.JRG)
By Jeff R. Graham
Copyright 2001
85.7% Light Return
Angles for R.I. = 1.63
53 facets + 8 facets on girdle = 61
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.161 T/L = 0.161
P/W = 0.405 C/W = 0.279
H/W = (P+C)/W+0.02 = 0.704
P/H = 0.576 C/H = 0.396
Vol./W^3 = 0.244

Addition # 6 - Cut in refractive indexes 1.62 to 1.93 (86.4%) with no changes. I designed this for Danburite, which is usually very pale. This design will help with dispersion and improve color...

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

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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