Masutomilite, an uncommon mica
Contributed by: FMS Admin
Date: Nov 13th, 2025
Locality: Alabashka pegmatite field, Yuzhakovo, Prigorodny District, Sverdlovsk Oblast, Russia (See on Mindat)
Description:
Masutomilite, Kazennitsa quarry, Murzinka, Ural, Russia. Masutomilite is the Mn equivalent of ferro-polylithionite. The blue fluorescence under 365 nm is probably caused by lattice defects.
Originally posted by groensteenfreterke on Nature’s Rainbow.
Summary of luminescence responses:
Masutomilite (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: Blue