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There are three polymorphs of Al2SiO5: andalusite, kyanite and sillimanite. Each of these minerals has the same chemical composition but differing crystal structure. Be sure to see our natural kyanite crystals and our natural andalusite mineral specimens
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We have over 150 tons of gem & mineral items in stock at our mineral warehouses, so be sure to let us know if you have any special requests. Please contact our webmaster or our 'site' geologist with any questions or comments.