search
  • Sign In
    Sign Up
  • English speaking customer support only

    Toll Free - USA & Canada only:
    1-800-464-1640

    International:
    +66-39303404

  • Change Language
  • USD

Buy Sillimanite Gems

(415)
Gem Type Weight Size Clarity Price Origin
More
Single
Pairs
Lots
Faceted
Cabochons
Sort By:
Clear All
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Medium Yellow Sillimanite Gem - 2.5ct Oval Facet (ID: 411418)

Oval Yellow Sillimanite

2.5ct
9.2 x 7.1 mm
$ 55.75
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
Medium Yellow Sillimanite Gem - 1.7ct Oval Facet (ID: 411627)

Oval Yellow Sillimanite

1.69 ct (total 3.38ctw)
8.1 x 6 mm
$ 118.30
Item in Stock
Click for Details
Compare
5 pcs
Add to Cart
Buy Now
Click for Product Video (411819)
Light 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
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Medium Yellow Sillimanite Gem - 2.8ct Oval Facet (ID: 411425)

Oval Yellow Sillimanite

2.8ct
9.8 x 7.8 mm
$ 63.65
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
Green Yellow Sillimanite Gem - 2.6ct Oval Facet (ID: 411279)

Oval Yellow Sillimanite

2.55 ct (total 5.09ctw)
10.1 x 8 mm
$ 114.88
Item in Stock
Click for Details
Compare
4 pcs
Add to Cart
Buy Now
Medium Yellow Sillimanite Gem - 0.9ct Oval Facet (ID: 411723)

Oval Yellow Sillimanite

0.87 ct (total 3.49ctw)
7 x 5.1 mm
$ 122.15
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
Greenish Yellow Sillimanite Gem - 1.7ct Oval Facet (ID: 411622)

Oval Yellow Sillimanite

1.67 ct (total 3.33ctw)
8 x 6.1 mm
$ 116.55
Item in Stock
Click for Details
Compare
4 pcs
Add to Cart
Buy Now
Clear White Sillimanite Cat's Eye Gem - 0.8ct Oval Cabochon (ID: 410351)

Oval White Sillimanite Cat's Eye

0.84 ct (total 3.37ctw)
6.6 x 4.7 mm
$ 12.20
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Very Light Grey Sillimanite Cat's Eye Gem - 1.5ct Oval Cabochon (ID: 474183)

Oval Gray Sillimanite Cat's Eye

1.5ct
7.9 x 5.8 mm
$ 4.44
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
Medium 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
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Greenish Yellow Sillimanite Gem - 2ct Cushion-Cut (ID: 411767)

Cushion Yellow Sillimanite

2ct
9.8 x 6 mm
$ 69.65
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Very Light Grey Sillimanite Cat's Eye Gem - 1.2ct Round Cabochon (ID: 551375)

Round Gray Sillimanite Cat's Eye

1.2ct
6.6 mm
$ 3.42
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Warm White Sillimanite Cat's Eye Gem - 2.5ct Oval Cabochon (ID: 410580)

Oval White Sillimanite Cat's Eye

2.5ct
7.9 x 7.1 mm
$ 17.57
Item in Stock
Click for Details
19 pcs
Select pcs
Add to Cart
Buy Now
Very Light Grey Sillimanite Cat's Eye Gem - 0.9ct Oval Cabochon (ID: 540983)

1 pc (avg. 0.89 ct) Gray Sillimanite Cat's Eye

6.5 x 4.3 mm
$ 2.50
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Light Yellow Sillimanite Cat's Eye Gem - 1.6ct Oval Cabochon (ID: 532958)

Oval Yellow Sillimanite Cat's Eye

1.6ct
8 x 5.4 mm
$ 4.27
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Medium Yellow Sillimanite Gem - 1.8ct Cushion-Cut (ID: 411766)

Cushion Yellow Sillimanite

1.8ct
9.9 x 5.9 mm
$ 61.60
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
White Sillimanite Cat's Eye Gem - 1.2ct Oval Cabochon (ID: 533539)

Oval White Sillimanite Cat's Eye

1.23 ct (total 2.45ctw)
7.7 x 5 mm
$ 6.71
Item in Stock
Click for Details
Compare
4 pcs
Add to Cart
Buy Now
Very Light Grey Sillimanite Cat's Eye Gem - 1.1ct Oval Cabochon (ID: 410426)

Oval Gray Sillimanite Cat's Eye

1.12 ct (total 4.49ctw)
7.1 x 4.7 mm
$ 16.25
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Medium Yellow Sillimanite Gem - 3.1ct Oval Facet (ID: 411329)

Oval Yellow Sillimanite

3.1ct
9.1 x 7.1 mm
$ 70.19
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
Clear White Sillimanite Cat's Eye Gem - 1.6ct Oval Cabochon (ID: 410340)

Oval White Sillimanite Cat's Eye

1.59 ct (total 3.18ctw)
8.1 x 5.5 mm
$ 11.51
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
Click for Product Video (411297)
Medium Yellow Sillimanite Gem - 2.5ct Oval Facet (ID: 411297)

Oval Yellow Sillimanite

2.47 ct (total 4.94ctw)
9.1 x 7.1 mm
$ 111.50
Item in Stock
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
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
GemSelect has a wonderful well described selection that surprises me how quickly it ships.
Posted By Tim in December, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
They have the best selection of different gems and the prices and fantastic
Posted By Brandi in December, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Very clear site. The photos and video make sure you know exactly what you are getting. I also appreciate all of the additional info. and definitions/explanations offered
Posted By NuthinClever in December, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Working on a special anniversary gem collection for my wife, and was able to find almost everything on this one site. Having bought from yall before, this was a no-brainer on where to go for the right stones/buying experience.
Posted By ESP in December, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great products and very customer friendly. Will be purchasing again. Thanks!
Posted By Joe in December, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
You have a much wider variety of stones than other dealers. I come back for this reason: lots and lots of everything.
Posted By G in December, 2019
Source: Bizrate
Sign up for our Newsletter
More Shapes
  • Asscher Cut
  • Baguette / Scissor Cut
  • Baguette Cabochon
  • Baguette Checkerboard
  • Baguette Crystal Cluster
  • Baguette Facet
  • Baguette Rose-Cut
  • Baguette Step Cut
  • Baguette Sugarloaf Cabochon
  • Baroque
  • Barrel
  • Barrel / Checkerboard
  • Barrel / Full-Round
  • Barrel / Scissor Cut
  • Barrel Cabochon
  • Barrel Rose Cut
  • Bear Carving with Hole
  • Bird Carving
  • Briolette with Hole
  • Carved Baguette
  • Carved Cameo
  • Carved Cushion
  • Carved Elephant
  • Carved Fancy
  • Carved Fish
  • Carved Fish with Hole
  • Carved Flower
  • Carved Fruit
  • Carved Half Heart
  • Carved Half Moon
  • Carved Heart
  • Carved Heart Cabochon
  • Carved Leaf
  • Carved Marquise
  • Carved Marquise Cabochon
  • Carved Octagon
  • Carved Oval
  • Carved Oval Cabochon
  • Carved Owl
  • Carved Pear
  • Carved Pear Cabochon
  • Carved Rhomb
  • Carved Rose
  • Carved Rose with Half Drilled Hole
  • Carved Round
  • Carved Round Cabochon
  • Carved Sheep
  • Carved Shell
  • Carved Square
  • Carved Teardrop
  • Carved Trillion
  • Carved Turtle
  • Cushion Buff-Top
  • Cushion Cabochon
  • Cushion Carved Medusa Cameo
  • Cushion Checkerboard
  • Cushion Checkerboard (double sided)
  • Cushion Concave Fantasy Cut
  • Cushion Crystal Cluster
  • Cushion Mixed Cut
  • Cushion Rose-Cut
  • Cushion Shape Sugarloaf Cabochon
  • Cushion Sugarloaf Cabochon
  • Cushion-Cut
  • Diamond-Cut
  • Drilled Faceted Sphere
  • Drilled Sphere
  • Drilled Square Rondelle Slice
  • Drop / Pear
  • Fancy Cabochon
  • Fancy Carved Cushion
  • Fancy Carved Oval
  • Fancy Carved Pear
  • Fancy Carved Round
  • Fancy Carved Trillion
  • Fancy Carving
  • Fancy Crystal Cluster
  • Fancy Facet
  • Fancy Fantasy Carved Leaf
  • Fancy Fantasy Carving
  • Fancy Slice
  • Fancy Star Facet
  • Fancy-Cut
  • Fantasy Carved Flower
  • Fantasy Carved Flower Cut
  • Fantasy Carved Leaf
  • Flower Carving
  • Flower-Cut
  • Half Heart Cabochon
  • Half Heart Facet
  • Half Moon Cabochon
  • Half Moon Facet-Cut
  • Half Moon Faceted
  • Half-Drilled Briolette
  • Half-Drilled Heart Checkerboard Facet
  • Half-Drilled Sphere
  • Heart Cabochon
  • Heart Checkerboard (double sided)
  • Heart Facet
  • Heart Rose-Cut
  • Hexagon Cut
  • Marquise Buff-Top
  • Marquise Cabochon
  • Marquise Checkerboard
  • Marquise Checkerboard (double sided)
  • Marquise Facet
  • Marquise Mixed Cut
  • Marquise Slice
  • Marquise Sugarloaf Cabochon
  • Octagon / Scissor Cut
  • Octagon Cabochon
  • Octagon Checkerboard
  • Octagon Facet
  • Octagon Step Cut
  • Oval Buff-Top
  • Oval Cabochon
  • Oval Cabochon with Hole
  • Oval Carved Cameo
  • Oval Checkerboard
  • Oval Checkerboard (double sided)
  • Oval Concave Cut
  • Oval Crystal Cluster
  • Oval Diamond-Cut
  • Oval Facet
  • Oval Fancy Facet
  • Oval Fantasy Concave Cut
  • Oval Mixed Cut
  • Oval Portuguese-Cut
  • Oval Rose-Cut
  • Oval Slice
  • Pear Cabochon
  • Pear Checkerboard
  • Pear Checkerboard with Hole
  • Pear Concave Cut
  • Pear Concave Fantasy Cut
  • Pear Crystal Cluster
  • Pear Double-Sided Checkerboard
  • Pear Facet
  • Pear Shape Sugarloaf Cabochon
  • Pear Slice
  • Pencil
  • Pencil Cut
  • Pentagon Facet
  • Princess-Cut
  • Rhomb Cabochon
  • Rhomb Checkerboard
  • Rhomb Checkerboard (Double-Sided)
  • Rhomb Facet
  • Rondelle
  • Round Buff-Top
  • Round Cabochon
  • Round Carved Cameo
  • Round Checkerboard
  • Round Checkerboard (double sided)
  • Round Concave Cut
  • Round Concave Fantasy Cut
  • Round Drilled Checkerboard (Double Sided)
  • Round Drilled Rondelle
  • Round Facet
  • Round Mixed Cut
  • Round Mixed-Cut
  • Round Petal Cut
  • Round Portuguese-Cut
  • Round Rose-Cut
  • Round Rose-Cut (double sided)
  • Shark Fin Cabochon
  • Shield Cabochon
  • Shield Checkboard
  • Spherical
  • Square / Scissor Cut
  • Square Cabochon
  • Square Facet
  • Square Rose-Cut
  • Square Step-Cut
  • Square Sugarloaf Cabochon
  • Square with Hole
  • Tapered Baguette
  • Tapered Baguette Cabochon
  • Teardrop Cabochon
  • Trapezoid
  • Trapezoid Cabochon
  • Trapezoid Checkerboard
  • Triangle
  • Triangle Cabochon
  • Trillion Cabochon
  • Trillion Checkerboard
  • Trillion Concave Cut
  • Trillion Concave Fantasy Cut
  • Trillion Crystal Cluster
  • Trillion Facet
  • Trillion Rose-Cut
  • Trillion Shape Sugarloaf Cabochon
  • Undrilled Briolette Teardrop
Popular Gemstones
  • Sapphire
  • Emerald
  • Ruby
  • Aquamarine
  • Zircon
  • Opal
  • Topaz
  • Tourmaline
  • Garnet
  • Amethyst
  • Citrine
  • Tanzanite
All Gemstones (144)
A B C D E F G H I J K L M N O P Q R S T V Z
  • Actinolite Cat's Eye
  • Agate
  • Agate Geode
  • Almandine Garnet
  • Amazonite
  • Amethyst
  • Ametrine
  • Ammolite
  • Andalusite
  • Andesine Labradorite
  • Apatite
  • Aquamarine
  • Aventurine
  • Beryl
  • Black Opal
  • Bloodstone
  • Boulder Opal
  • Calcite
  • Carnelian
  • Cat's Eye Apatite
  • Cat's Eye Aquamarine
  • Cat's Eye Augite
  • Cat's Eye Gemstones
  • Cat's Eye Moonstone
  • Cat's Eye Opal
  • Cat's Eye Scapolite
  • Chalcedony
  • Charoite
  • Chocolate Opal
  • Chrome Diopside
  • Chrome Tourmaline
  • Chrysoberyl
  • Chrysocolla
  • Chrysoprase
  • Citrine
  • Color-Change Diaspore
  • Color-Change Fluorite
  • Color-Change Garnet
  • Color-Change Sapphire
  • Coral
  • Demantoid Garnet
  • Dendritic Agate
  • Diamond
  • Druzy Amethyst
  • Druzy Azurite
  • Emerald
  • Enstatite
  • Fire Agate
  • Fire Opal
  • Fluorite
  • Fossil Coral
  • Garnet
  • Golden Beryl
  • Grandidierite
  • Grossularite Garnet
  • Hawk's Eye
  • Hematite
  • Hemimorphite Druzy
  • Hessonite Garnet
  • Hiddenite
  • Howlite
  • Idocrase
  • Imperial Topaz
  • Iolite
  • Jade Gemstones
  • Jadeite
  • Jasper
  • Kornerupine
  • Kunzite
  • Kyanite
  • Labradorite
  • Lapis Lazuli
  • Larimar
  • Malachite
  • Malaya Garnet
  • Mali Garnet
  • Maw-Sit-Sit
  • Moonstone
  • Morganite
  • Moss Opal
  • Mother of Pearl
  • Mystic Quartz
  • Mystic Topaz
  • Nuummite
  • Obsidian
  • Opal
  • Opal Doublet
  • Opal in Matrix
  • Pearl
  • Peridot
  • Pietersite
  • Prehnite
  • Pyrite
  • Pyrope Garnet
  • Quartz
  • Quartz Cat's Eye
  • Quartz With Marcasite
  • Rainbow Moonstone
  • Rainbow Pyrite
  • Rhodochrosite
  • Rhodolite Garnet
  • Rhodonite
  • Rose Quartz
  • Rubellite Tourmaline
  • Ruby
  • Ruby in Fuchsite
  • Ruby-Zoisite
  • Rutile Quartz
  • Sapphire
  • Scolecite
  • Seraphinite
  • Serpentine
  • Sillimanite
  • Sillimanite Cat's Eye
  • Smithsonite
  • Smoky Quartz
  • Snowflake Obsidian
  • Sodalite
  • Spectrolite
  • Spessartite Garnet
  • Sphalerite
  • Sphene
  • Spinel
  • Star Diopside
  • Star Garnet
  • Star Gemstones
  • Star Lemon Quartz
  • Star Moonstone
  • Star Rose Quartz
  • Star Ruby
  • Star Sapphire
  • Star Sunstone
  • Strawberry Quartz
  • Sugilite
  • Sunstone
  • Tanzanite
  • Tiger's Eye
  • Tiger's Eye Matrix
  • Topaz
  • Tourmaline
  • Tsavorite Garnet
  • Turquoise
  • Variscite
  • Zircon
Main Categories
  • New Arrivals
  • Gemstone Lots
  • Calibrated Gemstones
  • Gemstones By Piece
  • Top Grade Gems
  • Matching Pairs
  • Cabochon Gemstones
  • Drilled Gems, Briolettes and Beads
  • Birthstones
  • Gemstone Carvings
  • Fancy Gemstones
  • Star Gemstones
  • Unheated Sapphire
English speaking customer support only

Toll Free - USA & Canada only:
1-800-464-1640

International:
+66-39303404

Save Money
No shipping Fees for Additional Items!
$8.90 Worldwide Shipping

Update Translation
 
Current Value
New Value
GemSelect Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
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