from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A manganese phosphate mineral with a striking purple colour.
from The Century Dictionary and Cyclopedia
- n. A hydrous manganic ferric phosphate ((Mn,Fe)2O3.P2O5. H2O) occurring in small irregular masses of a purple or dark red color: found in Gaston County, North Carolina, and also in San Diego County, California, and elsewhere.
Sorry, no etymologies found.