Fluorescent Mineral Database

A new secret project! Trying to create a nice Fluorescent Mineral Database (FMDB), which would be searchable by mineral, locality, and luminescence properties. Also making it easy for people to contribute with their own specimens!

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.

Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Masutomilite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Blue

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