Prestidigitation

by Arya Akhavan (June 2013)
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Gemology Projectopen
L/W
115%
Design RI
1.76
H/W
82%
Gear
96
V/W³
0.334
Symmetry
3 (mirrored)
Facets
34
Tiers
9
Crown
16
Pavilion
12

If you have a perfectly cube-shaped piece of rough, what gives you the best yield? A square oriented on one of the flats? A square oriented on a cube edge? Nope. Turns out to be a hexagon, oriented on a cube vertex! Works in materials from fluorite to CZ (RI = 1.43 - 2.16) with no changes, but I prefer green synthetic corundum. Suggested size = 7-15 mm

Wireframe

Prestidigitation 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
961632486480
Set stone size.
P368.53°
963264
Level girdle.
P149.85°
164880
Cut to centerpoint.
P248.86°
151747497981
Meet at culet.

Crown

#AngleFacetsNotes
C265.54°
164880
Level girdle.
C140.70°
963264
Set girdle width.
C335.67°
 23034626694
Meet G1, C1, C2
C422.96°
963264
Meet C1, C3
T0.00°
24
Meet C2, C3, C4