Massive dark purple Purpurite with a 1933 old lablel (see prov.) tab. It comes with an old label from the G. Emery collection. See prov. tab - dated 1922.
Purpurite
Formula
(Mn3+,Fe3+)PO4
Crystal System
Orthorhombic
Crystal Habit
Massive - Granular
Cleavage
Perfect, Perfect, None
Luster
Earthy (Dull)
Color
brownish black, violet, dark pink, dark red, reddish purple