Pat's Points: 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 "Pat's Points".0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Pat's Points (MC16.JRG)
By Jeff R. Graham
75.9% Light Return
Angles for R.I. = 1.62
35 facets + 7 facets on girdle = 42
1-fold, mirror-image symmetry
L/W = 1.330 T/W = 0.844 T/L = 0.635
P/W = 0.614 C/W = 0.172
H/W = (P+C)/W+0.02 = 0.805
P/H = 0.762 C/H = 0.213
Vol./W^3 = 0.416
Addition # 4 - This is designed to be used in sets, it cuts pretty easy and has a nice flash. It works well around a square or trillion. Cut in about any material, I prefer medium color, 1/2ct and up. This works in Topaz... Cut this in R.I. 1.62 to 2.14 without changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Tourmaline Value, Price, and Jewelry Information
Mint Tourmalines: Gemstones for Our Times
Tourmaline Engagement Ring Stones: the Ultimate Guide
How Do Tourmalines Form?
Lapidary Technology Through the Ages: Laps and Polish
Why are Topaz and Citrine Gemstones Misidentified?
Identifying Garnets Simplified
Staurolite Value, Price, and Jewelry Information
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
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!