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ID: 4103442 pcs
thumb image of 2.4ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410344)
2.36 ct Sillimanite Cat's Eye
7.5 x 5.1 mm
$ 8.54
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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: 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: 4105981 pcs
thumb image of 3.7ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410598)
3.72 ct Sillimanite Cat's Eye
10.1 x 7.4 mm
$ 26.04
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ID: 4101752 pcs
thumb image of 1.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410175)
1.91 ct Sillimanite Cat's Eye
7.8 x 5.5 mm
$ 6.91
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ID: 4101994 pcs
thumb image of 3.1ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410199)
3.07 ct Sillimanite Cat's Eye
7 x 4.7 mm
$ 11.11
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ID: 4102062 pcs
thumb image of 2.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410206)
2.93 ct Sillimanite Cat's Eye
7.7 x 5.5 mm
$ 10.61
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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: 4382491 pcs
thumb image of 2.1ct Oval Cabochon Greenish Brown Sillimanite Cat's Eye (ID: 438249)
2.09 ct Sillimanite Cat's Eye
8.2 x 6 mm
$ 14.63
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ID: 4107521 pcs
thumb image of 2.9ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410752)
2.85 ct Sillimanite Cat's Eye
9.6 x 6.4 mm
$ 19.95
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ID: 4101792 pcs
thumb image of 3.1ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410179)
3.14 ct Sillimanite Cat's Eye
8 x 5.7 mm
$ 11.37
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ID: 4102024 pcs
thumb image of 3.2ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410202)
3.21 ct Sillimanite Cat's Eye
6.5 x 4.4 mm
$ 11.62
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ID: 4099642 pcs
thumb image of 2.5ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409964)
2.46 ct Sillimanite Cat's Eye
7.4 x 5.5 mm
$ 8.91
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ID: 4105701 pcs
thumb image of 3.6ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410570)
3.57 ct Sillimanite Cat's Eye
10.5 x 7.5 mm
$ 24.99
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ID: 4100632 pcs
thumb image of 2.6ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410063)
2.57 ct Sillimanite Cat's Eye
7.9 x 5.6 mm
$ 9.30
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ID: 4101964 pcs
thumb image of 3.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410196)
3.87 ct Sillimanite Cat's Eye
7.1 x 4.6 mm
$ 14.01
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ID: 4105751 pcs
thumb image of 1.9ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410575)
1.91 ct Sillimanite Cat's Eye
8.9 x 5.8 mm
$ 13.37
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ID: 4099024 pcs
thumb image of 2.7ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409902)
2.69 ct Sillimanite Cat's Eye
6.8 x 4.3 mm
$ 9.74
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ID: 4101822 pcs
thumb image of 2.5ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410182)
2.47 ct Sillimanite Cat's Eye
7.3 x 4.9 mm
$ 8.94
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ID: 4100762 pcs
thumb image of 2.3ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410076)
2.27 ct Sillimanite Cat's Eye
7.2 x 5.3 mm
$ 8.22
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ID: 4103022 pcs
thumb image of 2ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410302)
1.95 ct Sillimanite Cat's Eye
6.7 x 4.2 mm
$ 7.06
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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,
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diameter x depth

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Note: 1ct = 0.2g

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