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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (316): Sillimanite - Cat's Eye Sillimanite Clear All
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Yellowish Green Sillimanite Gem - 2.8ct Oval Facet (ID: 411425)

Oval Green Sillimanite

2.8ct
9.8 x 7.8 mm
$ 63.65
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4 pcs
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Green Yellow Sillimanite Gem - 1ct Oval Facet (ID: 411717)

Oval Yellow Sillimanite

0.97 ct (total 3.89ctw)
7.2 x 5.2 mm
$ 136.15
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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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2 pcs
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Yellowish Green Sillimanite Gem - 2.5ct Oval Facet (ID: 411297)

Oval Green Sillimanite

2.47 ct (total 4.94ctw)
9.1 x 7.1 mm
$ 111.50
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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.5ct Oval Cabochon (ID: 474678)

Oval Gray Sillimanite Cat's Eye

1.5ct
7.7 x 6.2 mm
$ 4.47
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1 pc
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Grayish Brown Sillimanite Cat's Eye Gem - 1.8ct Oval Cabochon (ID: 471902)

Oval Brown Sillimanite Cat's Eye

1.8ct
7.5 x 6.5 mm
$ 5.52
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1 pc
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Green Yellow Sillimanite Gem - 3.1ct Oval Facet (ID: 411329)

Oval Yellow Sillimanite

3.1ct
9.1 x 7.1 mm
$ 70.19
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2 pcs
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Green Yellow Sillimanite Gem - 1.4ct Oval Facet (ID: 411624)

Oval Yellow Sillimanite

1.40 ct (total 2.80ctw)
8 x 6.2 mm
$ 98.00
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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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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.7ct Oval Cabochon (ID: 499427)

Oval Gray Sillimanite Cat's Eye

1.7ct
7.6 x 5.6 mm
$ 5.19
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1 pc
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Green Yellow Sillimanite Gem - 2ct Cushion-Cut (ID: 411767)

Cushion Yellow Sillimanite

2ct
9.8 x 6 mm
$ 69.65
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2 pcs
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Smoke Sillimanite Cat's Eye Gem - 1.2ct Oval Cabochon (ID: 410082)

Oval Brown Sillimanite Cat's Eye

1.19 ct (total 2.38ctw)
7.1 x 4.8 mm
$ 8.62
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5 pcs
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Green Yellow Sillimanite Gem - 1.1ct Oval Facet (ID: 411819)

Oval Yellow Sillimanite

1.10 ct (total 5.52ctw)
7.1 x 5.1 mm
$ 193.20
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2 pcs
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Smoke Sillimanite Cat's Eye Gem - 0.9ct Oval Cabochon (ID: 499387)

Oval Gray Sillimanite Cat's Eye

0.88 ct (total 1.76ctw)
6.9 x 4.5 mm
$ 5.28
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1 pc
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Green Yellow Sillimanite Gem - 1.1ct Diamond-Cut (ID: 411686)

Round Yellow Sillimanite

1.1ct
6.2 mm
$ 38.50
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5 pcs
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Green Yellow Sillimanite Gem - 1ct Oval Facet (ID: 411820)

Oval Yellow Sillimanite

1.04 ct (total 5.18ctw)
6.6 x 4.9 mm
$ 181.30
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1 pc
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Green Yellow Sillimanite Gem - 2.8ct Oval Facet (ID: 411453)

Oval Yellow Sillimanite

2.8ct
10 x 8.2 mm
$ 63.65
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1 pc
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Smoke Sillimanite Cat's Eye Gem - 1.5ct Oval Cabochon (ID: 474183)

Oval Brown Sillimanite Cat's Eye

1.5ct
7.9 x 5.8 mm
$ 4.44
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2 pcs
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Yellowish Green Sillimanite Gem - 2.6ct Oval Facet (ID: 411279)

Oval Green Sillimanite

2.55 ct (total 5.09ctw)
10.1 x 8 mm
$ 114.88
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2 pcs
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Green Yellow Sillimanite Gem - 2.8ct Oval Facet (ID: 411303)

Oval Yellow Sillimanite

2.80 ct (total 5.60ctw)
10.3 x 8 mm
$ 126.39
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2 pcs
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Yellowish Green Sillimanite Gem - 1.7ct Oval Facet (ID: 411622)

Oval Green Sillimanite

1.67 ct (total 3.33ctw)
8 x 6.1 mm
$ 116.55
Item in Stock
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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.
Certified Customer Reviews
Overall Rating -> 10 star ratings
I found a beautiful rose quartz stone in the right size for the right price.
Posted By Calico9999 in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Gemselect is o.k the prices are pretty good, but the shipping prices really suck, one time I order from them and order got lost or never came, but they were good about fixing the problem and rectifying the situation, the stones and good, and the ones that come in the mail, look just as pictured on the website, or all it's not bad and its were I go to get my stones.
Posted By Spinach in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Perfect experience. Pictures were accurate, selection was easy to maneuver. Product arrived as ordered.
Posted By Jess in February, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Easy to shop through gemselect and will look there for future purchases.
Posted By Childcapo in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
good value
Posted By Don in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
It was super easy to browse all the gemstones and find exactly what you wanted. The prices were great and the checkout process was smooth. Seems like a great site, will definitely come back to find more in the future.
Posted By JMWatch Guy in February, 2019
Source: Bizrate
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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

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