Simple Triangle Checkerboard

by Arya Akhavan (April 2014)
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Gemology Projectopen
L/W
103%
Design RI
1.50
H/W
61%
Gear
96
V/W³
0.175
Symmetry
3 (mirrored)
Facets
52
Tiers
11
Crown
28
Pavilion
12

Plenty of people have written designs that have checkerboards like this. I wanted one that would have a much simpler pavilion, while also having a very interesting reflection pattern. This accomplishes both. Now with more contrast! Works in materials from petalite to rutile (RI = 1.50 - 2.62) with no changes, but I prefer Mali garnets. Suggested size = 7-12 mm

Wireframe

Simple Triangle Checkerboard 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
141846507882
Set stone size.
G290.00°
112143537585
Level girdle.
P145.80°
141846507882
Cut to centerpoint.
P243.00°
112143537585
Meet at culet.

Crown

#AngleFacetsNotes
C149.48°
141846507882
Set girdle width.
C247.43°
112143537585
Level girdle.
C322.00°
963264
Meet G2, C2
C419.43°
963264
Meet C1, C2, C3
C516.98°
 82440567288
Meet C1, C2, C3, C4
C610.00°
164880
Meet C1, C5; C4, C5
T0.00°
24
Meet C4, C5, C6