Four Hummers II
GemCad Ray Traces for RI = 1.54
Random Model Cosine Model ISO Model
Four Hummers II
designed by Bob Keller 11.18.01
Angles for R.I. = 1.54 and Up 85 facets + 12 facets on girdle = 97
4-fold, mirror-image symmetry 96 index
L/W = 1.000 T/W = 0.168 T/L = 0.168 P/W = 0.511 C/W = 0.194 H/W = (P+C)/W+0.02 = 0.725 P/H = 0.704 C/H = 0.268
Vol./W^3 = 0.276 Brightness at 0 degrees tilt for RI = 1.54
COS = 88.8 ISO = 92.0
Pavilion
1 42.00 96-04-08-12-16-20-24-28-32-36-40-44-48
52-56-60-64-68-72-76-80-84-88-92
Cut to center point
g1 90.00 12-36-60-84 Set size
g2 90.00 02-22-26-46-50-70-74-94 Meet 1.1.g1
2 75.00 02-22-26-46-50-70-74-94 Meet 1.g1.g2
3 70.18 96-24-48-72 Meet 1.1.2, 2.g2.g2.2
Crown
a 78.00 02-22-26-46-50-70-74-94 Level upper girdle line, match g2
b 39.27 12-36-60-84 Meet g1.g2.a
c 32.71 06-18-30-42-54-66-78-90 Meet g1.g2.a.b
d 24.67 06-18-30-42-54-66-78-90 Meet a.c.c.a, c.b.c
e 18.66 03-21-27-45-51-69-75-93 Meet a.c.d
f 17.61 96-24-48-72 Meet a.c.d.e
g 20.90 12-36-60-84 Meet b.c.d
h 16.26 12-36-60-84 Meet e.f.f.e
t 0.00 Table Meet e.f.h

A Four Hummers II GemCad Design File is available for GemCad users.


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© Bob's Rock Shop Bob Keller