Old Mine, All Mine

by Arya Akhavan (July 2013)
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Gemology Projectopen
L/W
100%
Design RI
1.65
H/W
62%
Gear
96
V/W³
0.223
Symmetry
4 (mirrored)
Facets
73
Tiers
11
Crown
33
Pavilion
40

I was taking a loook at old-style classic gems, and stumbled on the crown design of what's supposedly "the" characteristic Old Mine pattern. I wanted to see what the fuss was about, so I wrote my own similar design. Works in materials from quartz to CZ (RI = 1.54 - 2.16) with no changes, but I prefer it in hiddenite. Suggested size = 6-12 mm

Wireframe

Old Mine, All Mine 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 222264650707494
Set stone size.
G290.00°
 420284452687692
Level girdle.
P143.86°
 222264650707494
Cut to centerpoint.
P343.20°
 123254749717395
Meet P1, G1
P242.40°
 420284452687692
Meet at culet.

Crown

#AngleFacetsNotes
C134.14°
 222264650707494
Set girdle width.
C233.20°
 420284452687692
Level girdle.
C328.23°
96244872
Meet G1, C1
C423.53°
12366084
Meet G2, C2
C520.64°
 321274551697593
Meet C1, C2, C3, C4
T0.00°
24
Meet C3, C5; C4, C5