Sillimanite
The Silicate Minerals
Sillimanite is Al2SiO5, one of three polymorphs along with kyanite and andalusite. See more under kyanite. Other Metamorphic Minerals
U.S. Geological Survey photo
Details of the Silicates
The Pyroxene MineralsThe Mica MineralsQuartz and Silica Minerals Gallery
More Silicates
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