from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A rare iron sulfate mineral that forms violet or white triclinic crystals.
from The Century Dictionary and Cyclopedia
- n. A hydrous sulphate of iron, occurring in tabular monoclinic crystals of a reddish-violet color: it is found in Chili.
F A von Quenstedt, German mineralogist, and -ite. (Wiktionary)