Corner Office: Faceting Design Diagram
Detailed information and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Corner Office"
Sunstone (Feldspar, Bytonite, Labradorite, Spectrolite, Orthoclase)
Corner Office (SUN14.JRG)
By Jeff R. Graham
87.8% Light Return
Angles for R.I. = 1.54
37 facets + 8 facets on girdle = 45
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.506 T/L = 0.506 P/W = 0.466
C/W = 0.207 H/W = (P+C)/W+0.02 = 0.693 P/H = 0.673 C/H = 0.298 Vol./W^3 = 0.307
Addition # 11 - Cut in refractive indexes 1.54 to 2.14 with no changes. The crown step can be adjusted. Note: The corners are floating, cut them as close to the diagram as you can. This is good for watermelon and single color material. The steps on the crown can vary to match rough, but deeper stones work best.
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.
Bytownite Value, Price, and Jewelry Information
Orthoclase Value, Price, and Jewelry Information
Feldspar Value, Price, and Jewelry Information
Labradorite Value, Price, and Jewelry Information
Pricing Faceted Gems and Calculating Your Return
Gemology Book Reviews: Careers
Augelite Value, Price, and Jewelry Information
Six Famous Aquamarines
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!