from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hydration of iolite.
from the GNU version of the Collaborative International Dictionary of English
- n. A hydrated silica of alumina, resulting from the alteration of iolite.
from The Century Dictionary and Cyclopedia
- n. A hydrated silicate of aluminium, of a greenish color and micaceous structure.
Fahlun + -ite, after a place in Sweden (nowadays written Falun). (Wiktionary)