Lethargy

by Arya Akhavan (June 2013)
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Gemology Projectopen
L/W
110%
Design RI
1.72
H/W
72%
Gear
96
V/W³
0.233
Symmetry
1 (mirrored)
Facets
43
Tiers
21
Crown
16
Pavilion
27

For some bizarre reason, I wanted to see if I could mess around with approximate 7-fold symmetry using a 96 index. GemCAD allows you to, somehow. I wasn't satisfied with my barion marquis, so I made it into a pear instead. Works in materials from orthoclase to CZ (RI = 1.52 - 2.16) with no changes, but I prefer red spinel. Suggested length = 6-12 mm

Wireframe

Lethargy 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
1284
Set stone size.
G290.00°
1878
Meet P1, G1
G390.00°
3363
Meet P1, G2
G490.00°
48
Meet P1, G3
P365.87°
1878
Level girdle.
P265.31°
1284
Level girdle.
P462.71°
3363
Level girdle.
P561.89°
48
Level girdle.
P144.40°
 7213448627589
Cut to centerpoint.
P643.20°
4749
Meet P1, P4, P5
P743.20°
2076
Meet P1, P3, P4
P843.20°
3363
Meet P1, P2, P3

Crown

#AngleFacetsNotes
C135.26°
48
Set girdle width.
C335.26°
1878
Level girdle.
C435.26°
1284
Level girdle.
C235.26°
3363
Level girdle.
C633.62°
1383
Meet G1, G2, C3, C4
C731.45°
1779
Meet G1, G2, C3, C4, C6
C523.03°
4254
Meet G3, G4, C1, C2
C818.80°
2472
Meet C2, C3, C7
T0.00°
24
Meet C4, C6