Miner: Faceting Design Diagram
Successful tips, details, and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Miner".0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff R. Graham
90.3% Light Return
Angles for R.I. = 1.62
65 facets + 16 facets on girdle = 81
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.641 T/L = 0.641
P/W = 0.502 C/W = 0.184
H/W = (P+C)/W+0.02 = 0.706
P/H = 0.711 C/H = 0.261
Vol./W^3 = 0.314
Addition # 5 - This is a "Money Cut"... I have designed this to be simple and adapt- able. The crown can be floated in, notice the lack of meet points. This will help recover weight because of the Barion shape and still be easy and fast. Cut this in light materials because it darkens a bit. Cut P1 to center point, then cut the girdle to meet, then the breaks. This can be cut in R.I. 1.62 to 1.76 (90.2%) with no 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?
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!