Brownish black, Violet, Dark pink, Dark red, Reddish purple.
Density:
3.4
Diaphaneity:
Subtranslucent to Opaque
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
4-5 - Fluorite-Apatite
Luminescence:
Non-fluorescent.
Luster:
Earthy (Dull)
Magnetism:
Nonmagnetic
Streak:
red
Optical Properties of Purpurite
Gladstone-Dale:
CI meas= -0.073 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2423,KPDmeas= 0.2629,KC= 0.2451 Ncalc = 1.83 - 1.9