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ID: 4102932 pcs
thumb image of 1.8ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410293)
1.83 ct Sillimanite Cat's Eye
7.1 x 4.8 mm
$ 6.62
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ID: 4103674 pcs
thumb image of 3.5ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410367)
3.50 ct Sillimanite Cat's Eye
6.7 x 4.2 mm
$ 12.67
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ID: 4100822 pcs
thumb image of 2.4ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410082)
2.38 ct Sillimanite Cat's Eye
7.1 x 4.8 mm
$ 8.62
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ID: 4105691 pcs
thumb image of 4ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410569)
4.00 ct Sillimanite Cat's Eye
10.4 x 7.3 mm
$ 28.00
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ID: 4105961 pcs
thumb image of 2.9ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410596)
2.87 ct Sillimanite Cat's Eye
8.7 x 6.4 mm
$ 20.09
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ID: 4105801 pcs
thumb image of 2.5ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410580)
2.51 ct Sillimanite Cat's Eye
7.9 x 7.1 mm
$ 17.57
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ID: 4102962 pcs
thumb image of 2.6ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410296)
2.59 ct Sillimanite Cat's Eye
7.5 x 5.3 mm
$ 9.38
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ID: 4098974 pcs
thumb image of 4.1ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409897)
4.12 ct Sillimanite Cat's Eye
7.1 x 4.8 mm
$ 14.91
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ID: 4098914 pcs
thumb image of 3.3ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409891)
3.29 ct Sillimanite Cat's Eye
6.4 x 4.4 mm
$ 11.91
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ID: 4099972 pcs
thumb image of 3ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409997)
2.97 ct Sillimanite Cat's Eye
7.9 x 5.2 mm
$ 10.75
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ID: 4106041 pcs
thumb image of 5.6ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410604)
5.56 ct Sillimanite Cat's Eye
11.8 x 8.1 mm
$ 38.92
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ID: 4102982 pcs
thumb image of 2.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410298)
2.91 ct Sillimanite Cat's Eye
8.1 x 5.3 mm
$ 10.53
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ID: 4102972 pcs
thumb image of 2ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410297)
2.00 ct Sillimanite Cat's Eye
6.9 x 4.5 mm
$ 7.24
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ID: 4102052 pcs
thumb image of 3.1ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410205)
3.09 ct Sillimanite Cat's Eye
7.5 x 5.4 mm
$ 11.19
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ID: 4103492 pcs
thumb image of 2.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410349)
2.88 ct Sillimanite Cat's Eye
7.7 x 5.6 mm
$ 10.43
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ID: 4100682 pcs
thumb image of 2.5ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410068)
2.53 ct Sillimanite Cat's Eye
7.2 x 5.2 mm
$ 9.16
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ID: 4101954 pcs
thumb image of 4.1ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410195)
4.10 ct Sillimanite Cat's Eye
7.1 x 5.1 mm
$ 14.84
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ID: 4098994 pcs
thumb image of 3.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409899)
3.93 ct Sillimanite Cat's Eye
7.1 x 4.7 mm
$ 14.23
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ID: 4100592 pcs
thumb image of 3ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410059)
2.99 ct Sillimanite Cat's Eye
7.4 x 5.2 mm
$ 10.82
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ID: 4102912 pcs
thumb image of 3ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410291)
2.95 ct Sillimanite Cat's Eye
8.4 x 4.9 mm
$ 10.68
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ID: 4101802 pcs
thumb image of 3.1ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410180)
3.05 ct Sillimanite Cat's Eye
7.9 x 5.9 mm
$ 11.04
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Sillimanite Cat's Eye
Sillimanite is an aluminum silicate, related to both andalusite and kyanite. In fact these three minerals are polymorphs - they share the same chemical composition but different crystal structures.

Sillimanite is named after the American chemist Benjamin Silliman (1779-1864). Silliman was one of the first American professors of science and taught at Yale University.
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Size and Weight

Gems are always measured in Millimeter (mm)

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length x width x depth,
except for round stones which are;
diameter x depth

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Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

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