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

D-Aqua 1 (AQUA1.JRG)
By Jeff R. Graham
Copyright 1993
75.5% Light Return
Angles for R.I. = 1.56
65 facets + 16 facets on girdle = 81
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.490 T/L = 0.490
P/W = 0.510 C/W = 0.230
H/W = (P+C)/W+0.02 = 0.759
P/H = 0.671 C/H = 0.303
Vol./W^3 = 0.281

Gram Book 1 - If you cut this design to center point you will waste a lot of material. It's best to cut a preform, and use the information under heading for sizes. It's very deep to help darken light material, almost no light is lost. Notice the darker areas on the Random light ray trace, this will help make lighter material look darker when cut, 1ct+. Cut in refractive index 1.56 to 2.14 (80.5%) with no changes.

 

Random - Cosine - ISO

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