PC 16.018

Bishop

Long, Robert H; Seattle F Design, Apr 93, p1
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DataVueopen
L/W
114%
Design RI
1.54
H/W
69%
Gear
96
V/W³
0.218
Symmetry
1 (mirrored)
Facets
38
Tiers
23
Crown
5
Pavilion
33

Same outline as 16.016 The Grace Cut. Start pavilion preform by rolling a low cone at 30 degrees.

Wireframe

Bishop 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
3462
Fix stone size.
G290.00°
1284
Level false girdle.
G390.00°
96
Level false girdle. This completes pref
P168.00°
3462
Meet P2-P2-G1-G1
P263.63°
96
Level girdle
P353.83°
1284
Level girdle
P451.19°
3759
Meet P2-P3-G1
P546.50°
 690
Meet P4-P5-G2-G3
P645.55°
 888
Meet P4-P5-P6-G2-G3
P744.79°
4056
Meet P1 at TCP
P841.80°
1779
Meet P3-P4-G1-G2
P941.00°
9612346284
Cut to TCP

Crown

#AngleFacetsNotes
C169.40°
96
Level girdle.
C262.00°
3462
Match pavilion. Set girdle width.
C347.03°
3660
Meet a-a-G1-G1
C445.55°
3264
Meet a-b-G1-G2
C540.08°
1284
Level girdle
C635.00°
 888
Meet b-c-G2-G3
C731.52°
1779
Meet a-b-e-G1-G2
C825.00°
3462
Meet e-f-j
C919.00°
1284
Meet b-f-g
C1015.00°
96
Meet g-c-g
T0.00°
48
Table