Sillimanite / Fibrolite

Andalusiitti, Sillimaniet, Sillimanit, Sillimanita, Szillimanit, Силлиманит, 矽線石, シリマナイト, סילימניט


Commonly known      rarer (so called collectors stones)      very rare (rarities)      relatively rare organic material


Formula: Al2SiO5
Mineral class: silicates
Crystal system: orthorhombic
Mohs scale: 6 - 7
Density (g/cm3): 3.24
Refractive index: 1.653 - 1.684
Cleavage: perfect
Colors: colorless, white, grey, yellowish, green, blue, violet
Luster: vitreous - subadamantine
Fluorescence: -
Pleochroism: depending on the color
X: yellow, brown, Y: green, brown, Z: blue, brown
Largest Sillimanite: 70 g (Somosierra / Sierra da Guadarrama / Kastilia / Spain), 2 cm?
Deposits: worldwide
1st Description: 1892
Name: in honor of the U.S. mineralogist Benjamin Silliman (1779 - 1864)

Sillimanite Mineral

Origin: Ohngaing / Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com
Sillimanite Mineral
Sillimanite

Weight: 15.86 ct

Origin: India

Photo by kind permission of © www.multicolour.com

Sillimanite

Size: 1.51 x 1.20 x 0.72 cm
Weight: 9.14 ct
Origin: India

Photo by kind permission of © www.multicolour.com

Sillimanite

Weight: 6.77 ct

Origin: India

Photo by kind permission of © www.multicolour.com

Sillimanite

Size: 1.31 x 0.95 x 0.73 cm
Weight: 6.19 ct
Origin: India

Photo by kind permission of © www.gemfrance.com

Sillimanite

Weight: 5.95 ct

Origin: Sri Lanka

Photo by kind permission of © www.gemfrance.com

Sillimanite

Photo by kind permission of © skywalker.cochise.edu

Sillimanite

Weight: 1.69 ct

Origin: Sri Lanka

Photo by kind permission of © www.djraregems.com

Sillimanite

Size: 1.1 x 1.0 x 0.6 cm
Weight: 4.15 ct
Origin: Orissa / India

Photo by kind permission of © www.lucianabarbosa.com

Sillimanite

Weight: 1.32 ct

Origin: Okampityah / Sri Lanka

Photo by kind permission of © www.wildfishgems.com

Sillimanite

Size: 1.14 x 0.89 x 0.58 cm
Weight: 4.81 ct
Origin: Myanmar

Photo by kind permission of © www.palagems.com

Sillimanite Mineral

Origin: Orissa / India

Photo by kind permission of © www.irocks.com
Sillimanite Mineral

Star Sillimanite

Weight: 7.5 ct

Photo by kind permission of © www.ridderborg.se

Sillimanite Cat's Eye

Size: 1.12 x 0.92 cm
Weight: 4.53 ct
Origin: Orissa / India

Photo by kind permission of © www.steveperrygems.com
Sillimanite Cat's Eye

Weight: 7.97 ct

Origin: Orissa / India

Photo by kind permission of © www.irocks.com
Sillimanite Cat's Eye

Photo by kind permission of © skywalker.cochise.edu
Sillimanite Cat's Eye
Sillimanite Cat's Eye

Photo by kind permission of © skywalker.cochise.edu
Sillimanite Cat's Eye

Weight: 18.15 ct

Photo by kind permission of © www.palagems.com
Sillimanite Cat's Eye

Weight: 12.23 ct

Origin: Orissa / India

Photo by kind permission of © www.irocks.com
Sillimanite Cat's Eye

Weight: 5.79 ct

Origin: Orissa / India

Photo by kind permission of © www.irocks.com
Sillimanite Cat's Eye

Weight: 4.25 ct

Origin: Orissa / India

Photo by kind permission of © www.irocks.com
Sillimanite Cat's Eye

Weight: 1.42 ct

Origin: Sri Lanka

Photo by kind permission of © www.irocks.com
Sillimanite Cat's Eye

Size: 2.00 x 1.31 cm
Weight: 19.90 ct
Origin: Tanzania

Photo by kind permission of © www.minclassics.com


⇐ Intro Page ⇐ Gemstones