Home Rough Bargains Equipment Books Online Designs Just Ask Jeff Order News List Contact Me Links
Amethyst Aquamarine Beryl Citrine Emerald Garnet Opal Peridot Sapphire Scapolite Spinel Sunstone Topaz Tourmaline Quartz Zircon
Beginner's Page New Stuff Odds & Ends Specials Parcels Synthetics
Cut Gemstones Gemological Information Gemstone Pricing Guides How to buy Gemstones

Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Pearl (CHECK33.JRG) 5.12 carat pink Tourmaline
By Jeff R. Graham
Copyright 2001
88.3% Light Return
Angles for R.I. = 1.62
53 facets + 17 facets on girdle = 70
1-fold, mirror-image symmetry
96 index
L/W = 1.165 T/W = 0.199 T/L = 0.171
P/W = 0.435 C/W = 0.217
H/W = (P+C)/W+0.02 = 0.672
P/H = 0.647 C/H = 0.324
Vol./W^3 = 0.241

Addition # 6 - I designed this to go with pearls. I wanted something roundish, but not quite round. I originally had Tourmaline in mind, but this works well for stones in refractive indexes 1.73 to 1.93 with no changes.

 

 


Random - Cosine - ISO

Return to OnLine Design Index

Home Rough Bargains Equipment Books Online Designs Just Ask Jeff Order News List Contact Me Links


Copyright 1998-2007 Gram Faceting - All Rights Reserved.