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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (162): Cat's Eye Sillimanite Clear All
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Grayish Brown Sillimanite Cat's Eye Gem - 2.9ct Oval Cabochon (ID: 410595)

Oval Brown Sillimanite Cat's Eye

2.9ct
9.5 x 6.4 mm
$ 20.09
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1 pc
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Grayish Brown Sillimanite Cat's Eye Gem - 2.9ct Oval Cabochon (ID: 410596)

Oval Brown Sillimanite Cat's Eye

2.9ct
8.7 x 6.4 mm
$ 20.09
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1.2ct Oval Cabochon (ID: 410374)

Oval Brown Sillimanite Cat's Eye

1.17 ct (total 4.68ctw)
7.5 x 5 mm
$ 16.94
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1.1ct Oval Cabochon (ID: 410197)

Oval Brown Sillimanite Cat's Eye

1.13 ct (total 4.50ctw)
7.4 x 4.9 mm
$ 16.29
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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.3ct Round Cabochon (ID: 474675)

Round Gray Sillimanite Cat's Eye

1.3ct
6.9 mm
$ 4.02
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1ct Oval Cabochon (ID: 409897)

Oval Brown Sillimanite Cat's Eye

1.03 ct (total 4.12ctw)
7.1 x 4.8 mm
$ 14.91
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1ct Oval Cabochon (ID: 410368)

Oval Brown Sillimanite Cat's Eye

1.02 ct (total 4.08ctw)
7.1 x 4.8 mm
$ 14.77
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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.4ct Oval Cabochon (ID: 474179)

Oval Brown Sillimanite Cat's Eye

1.4ct
7.8 x 4.6 mm
$ 4.11
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1ct Oval Cabochon (ID: 409899)

Oval Brown Sillimanite Cat's Eye

0.98 ct (total 3.93ctw)
7.1 x 4.7 mm
$ 14.23
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2 pcs
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Smoke Sillimanite Cat's Eye Gem - 0.7ct Oval Cabochon (ID: 474171)

Oval Gray Sillimanite Cat's Eye

0.69 ct (total 1.37ctw)
6.3 x 3.8 mm
$ 4.11
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1.1ct Oval Cabochon (ID: 410365)

Oval Brown Sillimanite Cat's Eye

1.07 ct (total 4.26ctw)
7.1 x 4.8 mm
$ 15.42
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1ct Oval Cabochon (ID: 410196)

Oval Brown Sillimanite Cat's Eye

0.97 ct (total 3.87ctw)
7.1 x 4.6 mm
$ 14.01
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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.4ct Oval Cabochon (ID: 499425)

Oval Gray Sillimanite Cat's Eye

1.4ct
7.7 x 5.2 mm
$ 4.17
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 1.1ct Oval Cabochon (ID: 410426)

Oval Brown Sillimanite Cat's Eye

1.12 ct (total 4.49ctw)
7.1 x 4.7 mm
$ 16.25
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 0.9ct Oval Cabochon (ID: 409898)

Oval Brown Sillimanite Cat's Eye

0.91 ct (total 3.64ctw)
6.9 x 4.3 mm
$ 13.18
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 0.9ct Oval Cabochon (ID: 410198)

Oval Brown Sillimanite Cat's Eye

0.91 ct (total 3.63ctw)
7.1 x 4.4 mm
$ 13.14
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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.4ct Oval Cabochon (ID: 499676)

Oval Gray Sillimanite Cat's Eye

1.4ct
7.6 x 5.1 mm
$ 4.23
Item in Stock
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 0.9ct Oval Cabochon (ID: 410367)

Oval Brown Sillimanite Cat's Eye

0.88 ct (total 3.50ctw)
6.7 x 4.2 mm
$ 12.67
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1 pc
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Grayish Brown Sillimanite Cat's Eye Gem - 1.9ct Oval Cabochon (ID: 410575)

Oval Brown Sillimanite Cat's Eye

1.9ct
8.9 x 5.8 mm
$ 13.37
Item in Stock
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4 pcs
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Smoke Sillimanite Cat's Eye Gem - 0.8ct Oval Cabochon (ID: 410351)

Oval Brown Sillimanite Cat's Eye

0.84 ct (total 3.37ctw)
6.6 x 4.7 mm
$ 12.20
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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.4ct Oval Cabochon (ID: 473994)

Oval Brown Sillimanite Cat's Eye

1.4ct
8.2 x 5.8 mm
$ 4.29
Item in Stock
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Cat's Eye Sillimanite
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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Overall Rating -> 9 star ratings
Great selection. Love the many learning features like articles and gem information. Prices competitive for natural stones. I do miss not having a selection of lab-made stones, CZ’s, etc, which are useful when price and cost are factors.
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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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