Kawazulite

General Information:
 Chemical Formula:
Bi2(Te,Se,S)3
 Composition:
(Molecular Weight = 728.32 gm)
Bismuth 57.39 % Bi
Tellurium 31.54 % Te
Selenium 9.76 % Se
Sulfur 1.32 % S 
 Empirical Formula:
Bi2Te1.8Se0.9S0.3
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[0001] Perfect
 Color:
silver white or tin white.
 Density:
7.79
 Diaphaniety:
Opaque
 Hardness:
1.5 - Between Talc and Gypsum
 Luster:
Metallic
 Streak:
steel gray
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