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)

Elizabeth’s Flash (CHECK20.JRG) 19.89 carat Tourmaline
By Jeff R. Graham
Copyright 2001
89.5% Light Return
Angles for R.I. = 1.62
27 facets + 4 facets on girdle = 31
2-fold, mirror-image symmetry
96 index
L/W = 1.200 T/W = 0.320 T/L = 0.267
P/W = 0.466 C/W = 0.231
H/W = (P+C)/W+0.02 = 0.717
P/H = 0.650 C/H = 0.322
Vol./W^3 = 0.489

Addition # 6 - This is designed to be deep for high yield return... I originally had a tri-colored crystal-shaped piece of Tourmaline rough that I designed this for. It was such an unusual piece of rough and I did not want to waste any of it. This works well in about any color, I particularly like it in multi-colored Tourmaline. It will tend to darken a bit...

 

 


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.