Masutomilite, an uncommon mica
- groensteenfreterke
- Jun 23, 2022
- 1 min read

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.