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ID: 4099892 pcs
thumb image of 2.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409989)
2.94 ct Sillimanite Cat's Eye
7.7 x 5 mm
$ 10.64
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ID: 4099932 pcs
thumb image of 2.8ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409993)
2.80 ct Sillimanite Cat's Eye
8 x 5.3 mm
$ 10.14
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ID: 4101762 pcs
thumb image of 2.7ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410176)
2.71 ct Sillimanite Cat's Eye
7.2 x 4.9 mm
$ 9.81
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ID: 4099712 pcs
thumb image of 2.7ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409971)
2.69 ct Sillimanite Cat's Eye
7.5 x 5 mm
$ 9.74
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ID: 4100752 pcs
thumb image of 2.6ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410075)
2.62 ct Sillimanite Cat's Eye
7.5 x 5.2 mm
$ 9.48
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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: 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: 4100622 pcs
thumb image of 2.8ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410062)
2.79 ct Sillimanite Cat's Eye
8.1 x 5.1 mm
$ 10.10
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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: 4105761 pcs
thumb image of 1.8ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410576)
1.84 ct Sillimanite Cat's Eye
7.7 x 5.8 mm
$ 12.88
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ID: 4100792 pcs
thumb image of 2.5ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410079)
2.53 ct Sillimanite Cat's Eye
7.8 x 5.5 mm
$ 9.16
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ID: 4101984 pcs
thumb image of 3.6ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410198)
3.63 ct Sillimanite Cat's Eye
7.1 x 4.4 mm
$ 13.14
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ID: 4103012 pcs
thumb image of 2.9ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410301)
2.86 ct Sillimanite Cat's Eye
7.9 x 5.2 mm
$ 10.35
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ID: 4100672 pcs
thumb image of 2.5ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410067)
2.53 ct Sillimanite Cat's Eye
7.2 x 5.2 mm
$ 9.16
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ID: 4098984 pcs
thumb image of 3.6ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 409898)
3.64 ct Sillimanite Cat's Eye
6.9 x 4.3 mm
$ 13.18
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ID: 4100602 pcs
thumb image of 2.6ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410060)
2.64 ct Sillimanite Cat's Eye
7.7 x 5.1 mm
$ 9.56
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ID: 4103402 pcs
thumb image of 3.2ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410340)
3.18 ct Sillimanite Cat's Eye
8.1 x 5.5 mm
$ 11.51
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ID: 4103714 pcs
thumb image of 3.8ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410371)
3.76 ct Sillimanite Cat's Eye
7.3 x 4.8 mm
$ 13.61
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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: 4105791 pcs
thumb image of 2ct Oval Cabochon Grayish Brown Sillimanite Cat's Eye (ID: 410579)
2.03 ct Sillimanite Cat's Eye
9 x 6.2 mm
$ 14.21
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ID: 4103482 pcs
thumb image of 2.5ct Oval Cabochon Smoke Sillimanite Cat's Eye (ID: 410348)
2.46 ct Sillimanite Cat's Eye
7.3 x 5.2 mm
$ 8.91
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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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