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Natural Sillimanite

Sillimanite also called FIBROLITE, is brown, pale green, or white glassy silicate mineral that often occurs in long, slender, needlelike crystals frequently found in fibrous aggregates. An aluminum silicate, Al2OSiO4, it occurs in high-temperature regionally metamorphosed clay-rich rocks (e.g., schists and gneisses). Sillimanite is found at many points in France, Madagascar, and the eastern United States; a pale sapphire-blue gem variety occurs in the gravels of Sri Lanka.


  • There are 11 Sillimanite gemstones available at Multicolour.com
  • Sillimanite(s) are organized in the following categories: Single,  gemstones.
  • Our most expensive Sillimanite is USD 215.95 and largest Sillimanite weight is CTS 6.17.
  • Our cheapest Sillimanite is USD 50.20 and smallest Sillimanite weight is CTS 2.51.

Sillimanite Profile

Color information: violet blue, grey green, colorless, brown, green,
Refractive Index: 1.658 - 1.678
Chemical Composition: Al2OSiO4
Hardness: 6 - 7.5
Density: 3.25
Crystal Group: Orthorhombic
Ocurrence: France, Madagascar, U.S.A., Sri Lanka, Burma. Kenya
Sign of the Zodiac: N/A
Month of the year: N/A
Sillimanite

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Finest gems/
Sapphire Single
From our finest gemstones collection
Sapphire Single Octagon Slightly included
Size: 15.60 X 6.00 MM
Weight: 4.650 CTS
Shape: Octagon
Clarity: Slightly included
Usually ships within 24 hours
OUR PRICE
USD 8640.00
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Deal of the Day/
Chrome Tourmaline Single
limited time offer, ref# YCH103aw
Chrome Tourmaline Single Fancy Slightly included
Size: 7.60 X 6.00 MM
Weight: 1.000 CTS
Shape: Fancy
Clarity: Slightly included
Usually ships within 24 hours
10 % OFF, YOU SAVE 13.50 USD
NOW ONLY
USD 121.50
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Today’s Trade/
Best Selling Gems:
Sapphire Sapphire
1625 Sapphire ’s available
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Spinel Spinel
392 Spinel ’s available
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Alexandrite Alexandrite
294 Alexandrite ’s available
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Tanzanite Tanzanite
467 Tanzanite ’s available
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Zircon Zircon
231 Zircon ’s available
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Gemstone Variety: Hits Index
Going Up Amber +496 +0.0%
average price USD 174.38 per item
Going Up Sapphire +2691 +0.1%
average price USD 384.40 per item
Going Up Alexandrite +1399 +0.2%
average price USD 1865.29 per item
Going Up Anatase +104 +0.0%
average price USD 206.25 per item
Going Up Turquoise +187 +0.1%
average price USD 55.56 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Diamond
More from the Gem Library about Birthstones.
Taurus Taurus
April 20 – May 20
Mutable Sign. Very earthy and quiet. Your zodiac stone...more

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