Hexactly

GemCad Ray Traces for RI = 1.72
Random Model	Cosine Model	ISO Model

Hexactly Designed by Bob Keller 12-00 bob@rockhounds.com
An easy to cut meetpoint design for spinel, corundum, garnet.
Angles for R.I. = 1.72	73 facets + 6 facets on girdle = 79
6-fold, mirror-image symmetry	96 index
L/W = 1.155 T/W = 0.654 T/L = 0.567 P/W = 0.502 C/W = 0.209	H/W = (P+C)/W+0.02 = 0.731 P/H = 0.687 C/H = 0.286
Vol./W^3 = 0.311	Brightness at 0 degrees tilt for RI = 1.72 COS = 81.4 ISO = 90.3

Pavilion
g1	90.00	96-16-32-48-64-80	Cut to equal depth - establish size
2	65.00	96-16-32-48-64-80	match g1 - make level girdle
3	41.00	08-24-40-56-72-88	meet g1,2 - culet
4	43.13	06-10-22-26-38-42-54-58-70-74-86-90	meet g1,2,3
5	39.61	05-11-21-27-37-43-53-59-69-75-85-91	meet 2,4 - culet
Crown
a	55.00	96-16-32-48-64-80	match g1 - make level girdle
b	45.00	02-14-18-30-34-46-50-62-66-78-82-94	meet g1,a
c	36.48	07-09-23-25-39-41-55-57-71-73-87-89	meet g1,a,b
d	34.00	08-24-40-56-72-88	meet b,c
t	0.00	Table	meet b,c,d

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