Elser's Challenge 2

by Arya Akhavan (July 2013)
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Gemology Projectopen
L/W
197%
Design RI
1.62
H/W
68%
Gear
96
V/W³
0.492
Symmetry
2 (mirrored)
Facets
87
Tiers
26
Crown
47
Pavilion
40

Last year, I got a piece of pink tourmaline with a 2.0 L/W ratio, and was challenged by Lisa Elser to write a high-yield design for it. I decided that my old design was too time-consuming, so I wrote a new, equally time- consuming one. Works in materials from petalite to peridot (RI = 1.50 - 1.65) with no changes. Suggested length = 10-20 mm

Wireframe

Elser's Challenge 2 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
 2465094
Set stone width.
G290.00°
 4445292
Meet P1, G1, P3
G390.00°
15336381
Meet G2, P4, P5
G490.00°
2472
Level girdle.
P442.88°
 4445292
Meet P1, G1, P3, G2 (level girdle)
P142.82°
 2465094
Cut to centerpoint.
P342.09°
 3455193
Meet P1, P2
P242.05°
 1474995
Meet P1, G1
P641.82°
15336381
Meet P4, P5, G2, G3 (level girdle)
P741.09°
2472
Meet P5, P6
P541.00°
 6425490
Meet P3, P4

Crown

#AngleFacetsNotes
C233.87°
 4445292
Level girdle.
C133.87°
 2465094
Set girdle width.
C732.10°
 3455193
Meet G1, G2, C1, C2
C831.75°
 1474995
Meet G1, C1
C329.25°
15336381
Level girdle.
C424.97°
2472
Level girdle.
C623.75°
 8405688
Meet G2, G3, C2, C3, C5
C523.75°
12366084
Meet G2, G3, C2, C3
C1223.72°
 2465094
Meet C1, C7, C8
C1122.41°
 6425490
Meet C2, C6, C7
C1419.46°
9648
Meet C8, C12; C11, C12, C13
C917.28°
2472
Meet C3, C4, C5
C1012.41°
2472
Meet C5, C6, C9
C138.97°
2472
Meet C6, C10, C11
T0.00°
24
Meet C11, C12, C13, C14