PHYSIOGRAPHY. 



Native Amalgam. 



59 



3. 



Regular octahedron. 



4. 

 Trapezohedron. 



5. Fig. 317. 



6. Fig. 318. 



P on a 

 Pon b 

 Pon t 

 Pon k 

 a on b 

 i on k 



135 00' PHILLIPS. 

 154 00 



150 00 " 



160 40 " 



161 2 " 

 169 5 " 



Cleavage, very indistinct traces parallel to the dodecahe- 

 dron. Fracture conchoidal, uneven. Surface smooth and 

 shining. 



Lustre metallic. Color silver-white. Streak unchanged. 



Brittle ; it emits a grating noise when cut with a knife. 

 Hardness =3-0 ... 3-5. Sp. gr. =13-755. 



Compound Varieties. Massive : individuals scarcely 

 discernible, fracture conchoidal, uneven. 



1. Two kinds of Native Amalgam have been distinguished, in refer- 

 ence to the solid or fluid state in which it is found. The fluid varieties 

 must be considered as solutions of the solid ones in fluid mercury. 



