Home Rough 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 Synthetics Topaz Tourmaline Quartz Zircon

Bargains Beginner's Page Eclectic New Stuff Odds & Ends Parcels Specials
Cut Gemstones Cutting Information Pricing Guides Buying Gemstones


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

Quick Square (B14.JRG)
By Jeff R. Graham
Copyright 1999
88.3% Light Return
Angles for R.I. = 1.62
61 facets + 12 facets on girdle = 73
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.562 T/L = 0.562
P/W = 0.523 C/W = 0.199
H/W = (P+C)/W+0.02 = 0.743
P/H = 0.705 C/H = 0.268
Vol./W^3 = 0.341

Addition # 5 - This works particularly well for medium colored materials. It is very fast to cut and does not have a lot of facets. This is really another “Money Cut”. I use it a lot, when I want a cushion square that will deepen color a bit. This works well in R.I. 1.62 to 1.76 (89.9%) with no changes.

 

 


Random - Cosine - ISO

Return to OnLine Design Index

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


Copyright 1998-2009 Gram Faceting - All Rights Reserved.