Tertschite

General Information:
 Chemical Formula:
Ca4B10O19·20(H2O)
 Composition:
(Molecular Weight = 932.71 gm)
Calcium 17.19 % Ca
Boron 11.59 % B 
Hydrogen 4.32 % H 
Oxygen 66.90 % O 
 Empirical Formula:
Ca4B10O19·20(H2O)
 Locality:
Kurtpinari mine, Faras, Turkey.
 Name Origin:
Named for Herman Tertsch (1880-1962), Austrian mineralogist.
Physical Properties:
 Color:
snow white.
 Habits:
Fibrous - Crystals made up of fibers., ,
 Luminescence:
Fluorescent, Short UV=blue violet.
 Luster:
Silky
 Streak:
white
More details...