Piatt's Oval

by Arya Akhavan (April 2015)
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Gemology Projectopen
L/W
150%
Design RI
1.54
H/W
75%
Gear
96
V/W³
0.436
Symmetry
2 (mirrored)
Facets
53
Tiers
15
Crown
21
Pavilion
32

When I came back from Tanzania back in 2011, I ended up cutting a tanzanite for my best friend's mom. She loved it, and wears it all the time. She recently lost an amethyst out of another ring, and so I designed this to be a unique and much more interesting "oval" that I could use as a replacement for that same setting. Designed for medium amethyst, but works in materials from quartz to peridot (RI = 1.54 - 1.65) with no changes.

Wireframe

Piatt's Oval 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
 3455193
Level girdle.
G290.00°
 7415589
Meet P1, P2, G1
G390.00°
21276975
Level girdle.
P244.31°
 3455193
Meet at culet.
P543.00°
 2465094
Meet P2, G1
P442.82°
21276975
Meet P1, P3
P342.50°
 7415589
Level girdle.
P142.00°
 5435391
Cut to centerpoint.

Crown

#AngleFacetsNotes
C160.94°
 3455193
Set girdle width.
C345.00°
21276975
Level girdle.
C240.00°
 7415589
Level girdle.
C430.44°
12366084
<eet G2. G3. C2. C3
C520.82°
9648
Meet C1, C2
C613.73°
2472
Meet C3, C4
T0.00°
24
Meet C2, C4, C5