Cleopatra's Eye
Designed by Bob Keller

Cleopatra's Eye

Cleopatra's Eye      Copyright Bob Keller 12-99
Angles for R.I. = 1.54 125 facets + 20 facets on girdle = 145
2-fold, mirror-image symmetry 96 index
L/W = 1.516 T/W = 0.452 T/L = 0.298 P/W = 0.701 C/W = 0.225 H/W = (P+C)/W+0.02 = 0.946 P/H = 0.741 C/H = 0.238
Vol./W^3 = 0.469 Brightness at 0 degrees tilt for R.I. = 1.54
COS = 69.1% ISO = 73.6%
Pavilion
p1 43.00 02-06-10-14-18-22-26-30-34-38-42-46-
50-54-58-62-66-70-74-78-82-86-90-94
Cut to equal depth - make permanent centerpoint at culet
g1 90.00 12-36-60-84 Meet corresponding p1 facets - establish size and girdle outline
g2 90.00 11-37-59-85 Meet corresponding p1 facets - establish girdle outline
g3 90.00 08-40-56-88 Meet corresponding p1 facets - establish girdle outline
g4 90.00 05-43-53-91 Meet corresponding p1 facets - establish girdle outline
g5 90.00 02-46-50-94 Meet corresponding p1 facets - establish girdle outline
b1 70.00 12-36-60-84 Meet g1,corresponding p1 - create level girdle
b2 70.36 11-37-59-85 Meet g2,corresponding p1 - create level girdle
b3 70.95 08-40-56-88 Meet g3,corresponding p1 - create level girdle
b4 71.29 05-43-53-91 Meet g4,corresponding p1 - create level girdle
b5 71.40 02-46-50-94 Meet g5,corresponding p1 - create level girdle
Crown
c1 53.95 12-36-60-84 Meet g1 - establish upper girdle line
c2 54.49 11-37-59-85 Meet g1,g2,c1 - create level girdle
c3 55.37 08-40-56-88 Meet g2,g3,c2 - create level girdle
c4 55.88 05-43-53-91 Meet g3,g4,c3 - create level girdle
c5 56.06 02-46-50-94 Meet g4,g5,c4 - create level girdle
c6 25.00 22-26-30-34-38-42-46-50-54-58-62-66-
70-74-78-82-86-90-94-02-06-10-14-18
Cut to equal depth - meet at c1,g1 and at corresponding
c2-c5 facets.
c7 15.00 02-06-10-14-18-22-26-30-34-38-42-46-
50-54-58-62-66-70-74-78-82-86-90-94
Step cut to equal depth - meet corresponding c6 facets
c8 13.70 96-08-16-24-32-40-48-56-64-72-80-88 Meet c6,c7
c9 0.00 Table Meet c7,c8

Above is an approximately 17 mm Cleopatra's Eye cut from blue CZ by faceter Lauren Hardy.

Celopatra's Eye is a design for large stones with light to medium color saturation. The 'Egyptian' or fat, marquise shaped outline was inspired by "Pharaoh's Eye", an old design for a 64 index appearing as Sapphire Faceting Guide No. 37 and credited as courtesy of Gems of the World. I originally started out trying to develop a more modern variation of Pharaoh's Eye for a 96 index using GemCad and meetpoint technique. The original design just isn't a meetpoint type, and I've yet to work out a meetpoint (or mostly so) rendering that closely resembles it.

However, Cleopatra's Eye spun off while I was working with preforms to generate the shape. It is a simple double barion which employs an Omni preform to generate the girdle outline. Girdle facets g1-g5 are cut to meet corresponding p1 pavilion facets and generate the outline. Then the corresponding b1-b5 barion facets are cut on the pavilion, creating a level girdle line.

The crown c1-c5 and c6 facets are derived from the pavilion b1-b5 and p1 facets by tangent ratio and reflection through the plane of the girdle, so they 'stack' in the crown and pavilion plan views. The c7 facets are step cut to create a circular 'iris', and the c8 facets create 12 embellishing, pyramid shaped facets around the arc of the iris. The table creates the 'pupil'.

If you cut a Cleo of your own, be sure and let me know what you've cut and how you've made out.


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Bob Keller