Metamorphic Sillimanite, Lanark, Ontario Sillimanite is an aluminosilicate mineral typically occurring as fibrous masses, commonly in schist or gneiss

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Metamorphic Sillimanite, Lanark, Ontario Sillimanite is an aluminosilicate mineral typically occurring as fibrous masses, commonly in schist or gneiss.

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Keywords: aluminosilicate, fibrolite, gneiss, lanark, metamorphic, mineral, ontario, polymorph, schist, sillimanite