Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
7.5 - Garnet
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Magnetism:
Nonmagnetic
Streak:
white
Optical Properties of Sapphirine
Gladstone-Dale:
CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.211,KPDmeas= 0.2079,KC= 0.1986 Ncalc = 1.68 - 1.69
Optical Data:
Biaxial (-), a=1.701-1.729, b=1.703-1.732, g=1.705-1.734, bire=0.0040-0.0050, 2V(Calc)=78-88, 2V(Meas)=51-69. Dispersion r < v.
Pleochroism (y):
greenish blue, blue, or dark blue.
Pleochroism (z):
deep blue, yellowish green, or green.
Calculated Properties of Sapphirine
Electron Density:
Bulk Density (Electron Density)=3.41 gm/cc note: Specific Gravity of Sapphirine =3.45 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PESapphirine = 1.47 barns/electron U=PESapphirine x rElectron Density= 5.01 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Sapphirine is Not Radioactive
Sapphirine Classification
Dana Class:
69.02.01b.01(69)Inosilicate Chains with Side Branches or Loops
Chemical Formula: 
