Glitter Mine #2: 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 "Mine #2".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Glitter Mine #2 (MC89.JRG)
By Jeff R. Graham
87.6% Light Return
Angles for R.I. = 1.62
129 facets + 8 facets on girdle = 137
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.474 T/L = 0.474 P/W = 0.508
C/W = 0.188 H/W = (P+C)/W+0.02 = 0.717 P/H = 0.709 C/H = 0.263 Vol./W^3 = 0.297
Addition # 12 - Cut in refractive indexes 1.62 to 2.14 with no changes. This works well in light to medium saturated material and needs to be a large stone. Rough in the table before cutting the star facets makes the meet easier.
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?
Creating Ring Mountings for Deep-Cut Gemstones
How Does Topaz Form?
Prosopite Value, Price, and Jewelry Information
Gemstone Doublets, Triplets, and Other Assembled Stones
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!