Diamond: 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 "Diamond".0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff R. Graham
84.3% Light Return
Angles for R.I. = 1.62
61 facets + 8 facets on girdle = 69
2-fold, mirror-image symmetry
L/W = 1.175 T/W = 0.634 T/L = 0.540
P/W = 0.480 C/W = 0.192
H/W = (P+C)/W+0.02 = 0.692
P/H = 0.694 C/H = 0.277
Vol./W^3 = 0.272
Addition # 5 - Cut in R.I. 1.62 through 1.76 with no changes... This is fast to cut and makes an unusual stone. I like it in almost any material.
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?
Why are Topaz and Citrine Gemstones Misidentified?
Identifying Garnets Simplified
Staurolite Value, Price, and Jewelry Information
Amethyst Buying Guide
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!