Americana

GemCad Ray Traces for RI = 1.64
Random Model Cosine Model ISO Model

Americana
Designed by Charles W. Covill covill@email.msn.com
Angles for R.I. = 1.64 81 facets + 16 facets on girdle = 97
4-fold, mirror-image symmetry 96 index
L/W = 1.000 T/W = 0.550 T/L = 0.550 P/W = 0.539 C/W = 0.174 H/W = (P+C)/W+0.02 = 0.733 P/H = 0.735 C/H = 0.237
Vol./W^3 = 0.296 Brightness at 0 degrees tilt for RI = 1.64
COS = 53.6 ISO = 61.6
Pavilion
1 43.00 03-09-15-21-27-33-39-45-
51-57-63-69-75-81-87-93
 
2 90.00 06-18-30-42-54-66-78-90  
3 48.00 05-19-29-43-53-67-77-91  
4 55.00 01-23-25-47-49-71-73-95  
5 90.00 01-23-25-47-49-71-73-95  
Crown
1 45.00 01-23-25-47-49-71-73-95  
2 46.00 06-18-30-42-54-66-78-90  
3 42.00 96-24-48-72  
4 31.00 96-24-48-72  
5 35.18 11-13-35-37-59-61-83-85  
6 28.00 01-23-25-47-49-71-73-95  
7 26.08 06-18-30-42-54-66-78-90  
8 0.00 Table  


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Bob Keller