Click on any sillimanite mineral specimen image below to enlarge it.
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 as well as our blue kyanite in matrix mineral specimens, and our natural andalusite mineral specimens
Would you like us to inform you when we add more natural chatoyant sillimanite specimens with genuine cats eye sheen on this page?
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.