Mars Dome: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Mars Dome".
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.
Related Articles
8-Swirl: Faceting Design Diagram
Prop: Faceting Design Diagram
Shovel Head: Faceting Design Diagram
Topaz Crystal I: Faceting Design Diagram
Latest Articles
Gemstone Radiation Treatment
Alternative Birthstones
What is Moonstone Gemstone? Value, Price, and Color
21 Beautiful Pink Gemstones: A Complete Guide
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!