Crystal Mine: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called Crystal Mine.
Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Crystal Mine (MC105.JRG)
By Jeff R. Graham
Copyright 2006
79.6% Light Return
Angles for R.I. = 1.54
121 facets + 8 facets on girdle = 129
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.411 T/L = 0.411 P/W = 0.519
C/W = 0.217 H/W = (P+C)/W+0.02 = 0.756 P/H = 0.687 C/H = 0.287 Vol./W^3 = 0.304
PAVILION
CROWN
Addition # 12 - Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed for Beryl and Quartz. It works well in light to medium saturations. I would recommend a 10mm or larger stone and it is especially good for Aquamarine.
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
Ametrine Value, Price, and Jewelry Information
Amethyst Value, Price, and Jewelry Information
Rose Quartz Value, Price, and Jewelry Information
Citrine Value, Price, and Jewelry Information
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!