Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Hardness:
3 - Calcite
Luster:
Vitreous (Glassy)
Streak:
orange
Optical Properties of Lotharmeyerite
Gladstone-Dale:
CI meas= 0.073 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.091 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1869,KPDmeas= 0.1904,KC= 0.2055 Ncalc = 1.87 - 1.89