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


Beryl (Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl)

Blue Ribbon (AQUA3.JRG)
By Jeff R. Graham
Copyright 1993
70% Light Return
Angles for R.I. = 1.56
81 facets + 16 facets on girdle = 97
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.635 T/L = 0.635
P/W = 0.449 C/W = 0.194
H/W = (P+C)/W+0.02 = 0.663
P/H = 0.678 C/H = 0.292
Vol./W^3 = 0.245

Gram Book 1 - Here is an unusual design that is a little different to cut. Cut P4 at exactly the right degree (42) and to center point, and you should get the right sizes. P6 is cut to center point, cut evenly, 1-8cts. Cut in refractive index 1.56 to 1.76 (75.6%) 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.