Not Enough Checkers

by Arya Akhavan (November 2014)
Save to collection
No ratings yet
Gemology Projectopen
L/W
140%
Design RI
1.54
H/W
79%
Gear
96
V/W³
0.480
Symmetry
2 (mirrored)
Facets
79
Tiers
24
Crown
31
Pavilion
32

I love checkerboards. I really do. This started out as an attempt to see how long of a stone I could write a checkerboard, and this 3x5 pattern was the maximum. Notice that the pavilion facets are VERY close together and will cut extremely quickly, so be careful!!! Works in materials from quartz to zircon (RI = 1.54 - 1.93) with no changes, but written for longer pieces of tourmaline with some surface crazing.

Wireframe

Not Enough Checkers 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
9648
Set stone width.
G290.00°
 3455193
Meet P1, P2, G1
G390.00°
 6425490
Level girdle.
G490.00°
20286876
Meet P5, P6, G3
G590.00°
2472
Level girdle.
P869.20°
2472
Meet P6, P7
P765.00°
20286876
Level girdle.
P946.70°
9648
Level girdle.
P243.58°
 1474995
Meet at culet.
P143.00°
 2465094
Cut to centerpoint.
P343.00°
 3455193
Level girdle.
P542.50°
 6425490
Meet G2, P3, P4
P442.19°
 4445292
Meet P1, P3
P642.09°
 7415589
Meet P4, P5

Crown

#AngleFacetsNotes
C158.64°
9648
Set girdle width.
C255.77°
 3455193
Level girdle.
C352.39°
 6425490
Level girdle.
C447.93°
20286876
Level girdle.
C546.94°
2472
Level girdle.
C629.83°
16326480
Meet G3, G4, C3, C4
C726.41°
2472
Meet C4, C5, C6
C822.07°
12366084
Meet C2, C3, C6
C916.00°
96244872
Meet C1, C2, C8; C6, C7, C8
T0.00°
24
Meet C8, C9