Confusion

by Arya Akhavan (August 2013)
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Gemology Projectopen
L/W
100%
Design RI
1.83
H/W
68%
Gear
96
V/W³
0.284
Symmetry
2 (mirrored)
Facets
125
Tiers
23
Crown
69
Pavilion
56

I was writing a design for a piece of Nd:YAG I have, shaped in a quarter-cylinder. The best shape for surface area would be a square, and for yield would be a rectangle with a keel, so I combined the two. It lookes confused. Works in materials from quartz to rutile (RI = 1.54 - 2.62) with no changes, but I prefer it in YAG. Suggested size = 12-25 mm

Wireframe

Confusion 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 1474995
Set stone size.
G290.00°
 3455193
Meet P1, P2, G1
G390.00°
 519294353677791
Level girdle.
G590.00°
21276975
Level girdle.
G690.00°
23257173
Level girdle.
P863.71°
23257173
Meet P4, P5, P6, P7
P761.85°
21276975
Meet P4, P5, P6
P658.54°
19296777
Meet P4, P5
P543.36°
 5435391
Meet G2, P3, P4
P143.00°
 1474995
Cut to centerpoint.
P342.91°
 3455193
Level girdle.
P442.79°
 4445292
Meet P2, P4
P242.60°
 2465094
Meet at culet.

Crown

#AngleFacetsNotes
C140.00°
 123254749717395
Set girdle width.
C240.00°
 321274551697593
Level girdle.
C340.00°
 519294353677791
Level girdle.
C537.29°
 420284452687692
Meet {G2, G3 OR G4, G5}, C2, C3
C437.00°
96244872
Meet {G1 OR G6}, C1
C734.00°
 321274551697593
Meet C1, C2, C4, C5, C6
C634.00°
 123254749717395
Meet C1, C2, C4, C5
C823.86°
 519294353677791
Meet C5, C7
C921.90°
 321274551697593
Meet C6, C7, C8
T0.00°
24
Meet C8, C9