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You Selected (248): Sillimanite Sillimanite Cat's Eye, Sillimanite Clear All
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ID: 4117224 pcs
thumb image of 4.4ct Oval Facet Green Yellow Sillimanite (ID: 411722)
4.41 ct Sillimanite
7.8 x 6 mm
$ 154.35
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ID: 4118195 pcs
thumb image of 5.5ct Oval Facet Green Yellow Sillimanite (ID: 411819)
5.52 ct Sillimanite
7.1 x 5.1 mm
$ 193.20
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ID: 4118174 pcs
thumb image of 4.8ct Oval Facet Green Yellow Sillimanite (ID: 411817)
4.75 ct Sillimanite
7.1 x 5 mm
$ 166.25
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ID: 4117174 pcs
thumb image of 3.9ct Oval Facet Green Yellow Sillimanite (ID: 411717)
3.89 ct Sillimanite
7.2 x 5.2 mm
$ 136.15
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ID: 4117961 pcs
thumb image of 0.4ct Oval Facet Green Yellow Sillimanite (ID: 411796)
0.36 ct Sillimanite
4.1 x 3.9 mm
$ 12.60
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ID: 4117254 pcs
thumb image of 3.5ct Oval Facet Green Yellow Sillimanite (ID: 411725)
3.48 ct Sillimanite
7 x 5.2 mm
$ 121.80
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ID: 4116272 pcs
thumb image of 3.4ct Oval Facet Green Yellow Sillimanite (ID: 411627)
3.38 ct Sillimanite
8.1 x 6 mm
$ 118.30
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ID: 4117194 pcs
thumb image of 4.1ct Oval Facet Green Yellow Sillimanite (ID: 411719)
4.11 ct Sillimanite
8 x 6 mm
$ 143.85
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ID: 4117214 pcs
thumb image of 3.4ct Oval Facet Green Yellow Sillimanite (ID: 411721)
3.35 ct Sillimanite
6.9 x 5 mm
$ 117.25
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ID: 4118185 pcs
thumb image of 4.3ct Oval Facet Green Yellow Sillimanite (ID: 411818)
4.31 ct Sillimanite
7 x 5.1 mm
$ 150.85
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ID: 4116222 pcs
thumb image of 3.3ct Oval Facet Green Yellow Sillimanite (ID: 411622)
3.33 ct Sillimanite
8 x 6.1 mm
$ 116.55
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ID: 4118205 pcs
thumb image of 5.2ct Oval Facet Green Yellow Sillimanite (ID: 411820)
5.18 ct Sillimanite
6.6 x 4.9 mm
$ 181.30
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ID: 4115631 pcs
thumb image of 1.5ct Oval Facet Green Yellow Sillimanite (ID: 411563)
1.50 ct Sillimanite
9 x 6.8 mm
$ 33.86
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ID: 4112792 pcs
thumb image of 5.1ct Oval Facet Green Yellow Sillimanite (ID: 411279)
5.09 ct Sillimanite
10.1 x 8 mm
$ 114.88
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ID: 4117234 pcs
thumb image of 3.5ct Oval Facet Green Yellow Sillimanite (ID: 411723)
3.49 ct Sillimanite
7 x 5.1 mm
$ 122.15
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ID: 4112782 pcs
thumb image of 5.2ct Oval Facet Green Yellow Sillimanite (ID: 411278)
5.16 ct Sillimanite
10 x 7.8 mm
$ 116.46
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ID: 4118113 pcs
thumb image of 3.2ct Oval Facet Green Yellow Sillimanite (ID: 411811)
3.23 ct Sillimanite
7.3 x 5.1 mm
$ 113.05
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ID: 4118226 pcs
thumb image of 4ct Oval Facet Green Yellow Sillimanite (ID: 411822)
4.04 ct Sillimanite
6.1 x 4.2 mm
$ 141.40
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ID: 4112732 pcs
thumb image of 4.9ct Oval Facet Green Yellow Sillimanite (ID: 411273)
4.88 ct Sillimanite
9 x 7.2 mm
$ 110.14
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ID: 4117881 pcs
thumb image of 0.9ct Oval Facet Green Yellow Sillimanite (ID: 411788)
0.91 ct Sillimanite
7 x 5 mm
$ 31.85
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ID: 4117871 pcs
thumb image of 1ct Oval Facet Green Yellow Sillimanite (ID: 411787)
1.02 ct Sillimanite
7.6 x 5.7 mm
$ 35.70
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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.

Sillimanite gems may show a cat's eye and be cut en cabochon, or they may be faceted, transparent gemstones. The colors of sillimanite include colorless, grayish-white, green, bluish and brownish. A fibrous variety of sillimanite is traded as "fibrolite". Some sillimanite gemstones show pleochroism, which means that several colors may be exhibited in a single gemstone depending on the viewing angle.
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Size and Weight

Gems are always measured in Millimeter (mm)

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

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

Note: 1ct = 0.2g

Size Comparison Chart