Frustrating Parallelogram

by Arya Akhavan (November 2013)
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Gemology Projectopen
L/W
169%
Design RI
1.62
H/W
73%
Gear
96
V/W³
0.470
Symmetry
2
Facets
49
Tiers
25
Crown
21
Pavilion
16

This was an inordinately frustrating design to write. I don't even remember what possessed me to write a parallelogram design. Why did I go with a diamond checker crown? Will I ever have the patience to cut this? No. Designed specifically for tourmaline, and performs poorly in anything else without scaling. Suggested length = 8-12 mm

Wireframe

Frustrating Parallelogram 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
9648
Set stone width.
G290.00°
 250
Level girdle.
G390.00°
1361
Meet P2, P4, G2
G490.00°
1765
Level girdle.
G590.00°
2068
Level girdle.
G690.00°
4694
Level girdle.
P666.96°
1765
Meet P3, P4, P5
P563.93°
1361
Level girdle.
P762.67°
2068
Meet P3, P4, P5, P6
P244.33°
 250
Meet at culet.
P143.62°
9648
Retain from preform.
P443.27°
 351
Meet at culet.
P842.37°
4694
Meet P3, P4, P5, P6, P7
P342.00°
4795
Meet at culet.

Crown

#AngleFacetsNotes
C167.26°
 250
Set girdle width.
C264.89°
9648
Level girdle.
C362.89°
4694
Level girdle.
C654.11°
1361
Level girdle.
C552.03°
1765
Level girdle.
C451.20°
2068
Level girdle.
C730.03°
 856
Meet G2, G3, C1, C6
C819.43°
9648
Meet C1, C2, C7
C918.98°
3583
Meet G5, G6, C3, C4; C2, C3, C8
C1016.98°
1765
Meet C4, C5, C9; C5, C6, C7
T0.00°
24
Meet C7, C8, C10; C8, C9, C10