PC08.094 Long Cushion Oval

Covill, Charles W; NM Facetor, Jun 93, v12n10
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DataVue
L/W
220%
Design RI
1.61
H/W
86%
Gear
96
V/W³
0.808
Symmetry
2 (mirrored)
Facets
75
Tiers
24
Crown
12
Pavilion
63

Very difficult to reproduce all angles. Indexing retained and tried to match L/W. Step P3 is critical.

P3 is a guesstimate that determines the entire shape.

Wireframe

PC08.094 Long Cushion Oval 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
 1474995
G290.00°
 2465094
G390.00°
12366084
G490.00°
222426707274
P159.50°
 1474995
Determine width
P257.50°
 2465094
Indeterminate (guesstimate)
P356.00°
9648
Cut to temp line culet
P452.50°
 1474995
Meet P1-P2-P3
P550.20°
12366084
Meet P3-P4-P7-P8
P648.00°
9648
Meet P4-P1-P4
P747.00°
 2465094
Meet P4-P5-P6
P845.10°
2472
Meet P10-P8-P8-P10
P944.50°
22267074
Meet P3-P4-P7-P8-P9
P1043.00°
 1474995
Meet P5 at PCP
P1138.66°
23257173
Meet P7-P6-P6-P7

Crown

#AngleFacetsNotes
C137.80°
 1474995
Meet C1 at girdle
C236.20°
 2465094
Meet C2 at girdle, level girdle
C335.00°
9648
Fix girdle width
C434.72°
2472
Meet C4-C6-C7-C6-C4-C7
C533.65°
22267074
Meet C4-C6-C6-C4
C625.70°
12366084
Meet C3 at girdle, level girdle
C725.30°
 1474995
Meet C1-C2-C3
C813.50°
14346282
Meet C3-C4-C5
T0.00°
96