Square Emerald 3

GemCad Ray Traces for RI = 1.54
Random Model Cosine Model 51.3 ISO Model 61.4
GemCad Ray Traces for RI = 2.14
Random Model Cosine Model 66.2 ISO Model 82.7
Square Emerald 3
A Simple Square Emerald / Step Cutting Tainer
Computed by Bob Keller 06.05.02 for Ryan Thompson
Angles for R.I. = 1.540 65 + 8 girdles = 73 facets
4-fold radial symmetry 96 index
L/W = 1.000 T/W = 0.501 U/W = 0.501 P/W = 0.531 C/W = 0.200
Vol./W^3 = 0.325 Brightness at 0 degrees tilt for
RI = 1.54 COS = 75.9 ISO = 80.6
Pavilion
g190.00°96-24-48-72Cut to equal depth, set size
g290.00°12-36-60-84Diagonal Distance = 1.1124W
a50.58°96-24-48-72Match g1, establish lower girdle line
b47.49°12-36-60-84Meet a.g1.g2
c48.60°96-24-48-72Match a
d45.48°12-36-60-84Meet c.a.b
e46.61°96-24-48-72Match c
f43.48°12-36-60-84Meet e.c.d
g44.60°96-24-48-72Match e
h41.49°12-36-60-84Meet g.e.f
i42.60°96-24-48-72Match g, meet at culet
j39.50°12-36-60-84Meet i.g.h, at culet
Crown
k53.05°96-24-48-72Match g1, establish upper girdle line
l50.00°12-36-60-84Meet g2.g1.k
m35.00°96-24-48-72Match k
n32.12°12-36-60-84Meet l.k.m
o21.26°96-24-48-72Match m
p19.23°12-36-60-84Meet n.m.o
t 0.00°Tablelevel table

The Square Emerald 3 design file is available for GemCad/GemPrint users.


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© Bob's Rock Shop Bob Keller