Pyrargyrite
Refractive Index low
ne 2,880 - 2,880
Refractive Index high
no 3,080 - 3,080
Birefringence
0.200 - 0.200
Density
5.82 - 5.85
Polariscope
1 negative
Colours:
grey, red, black
Transparency:
Transparent, Translucent, Opaque
Remarks:
no remark
Hardness:
2,5 - 2,5
Formula:
Ag3SbS3
System:
Trigonal
Rare?
5