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
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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) |
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Sillimanite Mineral
Origin: Ohngaing / Mogok / Myanmar Photo by kind permission of © www.crystal-treasure.com |
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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 |
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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 |
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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 |
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Sillimanite
Weight: 1.32 ct Origin: Okampityah / Sri Lanka Photo by kind permission of © www.wildfishgems.com |
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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 |
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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 |
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Sillimanite Cat's Eye
Weight: 7.97 ct Origin: Orissa / India Photo by kind permission of © www.irocks.com |
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Sillimanite Cat's Eye
Weight: 12.23 ct Origin: Orissa / India Photo by kind permission of © www.irocks.com |
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Sillimanite Cat's Eye
Weight: 5.79 ct Origin: Orissa / India Photo by kind permission of © www.irocks.com |
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Sillimanite Cat's Eye
Weight: 4.25 ct Origin: Orissa / India Photo by kind permission of © www.irocks.com |
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Sillimanite Cat's Eye
Weight: 1.42 ct Origin: Sri Lanka Photo by kind permission of © www.irocks.com |
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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 |
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