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Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Habit:
Columnar - Forms columns
Habit:
Fibrous - Crystals made up of fibers.
Habit:
Pseudo Hexagonal - Crystals show a hexagonal outline.
Hardness:
3.5-4 - Copper Penny-Fluorite
Luminescence:
Fluorescent and phosphorescent, Short UV=green,yellow white, Long UV=green, yellow pink.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Aragonite
Gladstone-Dale:
CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2157,KPDmeas= 0.2157,KC= 0.2104 Ncalc = 1.62
Optical Data:
Biaxial (-), a=1.529-1.53, b=1.68-1.682, g=1.685-1.686, bire=0.1560, 2V(Calc)=16-18, 2V(Meas)=18-19. Dispersion weak, r < v.
Pleochroism (x):
no.
Calculated Properties of Aragonite
Electron Density:
Bulk Density (Electron Density)=2.93 gm/cc note: Specific Gravity of Aragonite =2.93 gm/cc.
Fermion Index:
Fermion Index = 0.0020908312 Boson Index = 0.9979091688
Photoelectric:
PEAragonite = 5.06 barns/electron U=PEAragonite x rElectron Density= 14.81 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Aragonite is Not Radioactive
Chemical Formula: 
