9 8 



I; — 'Native Elements : 



Native silver, native bismuth, graphite. 

 II. — Arsenides : 



Niccolite, or arsenide of nickel, NiAs; chloan- 

 thite, or diarsenide of nickel, NiAs 2 ; smaltite, 

 or diarsenide of cobalt, CoAs 2 . 

 III. — Arsenates : 



Erythrite, or cobalt bloom, Co 3 As 2 8 -|-8H 2 ; 

 and annabergite, or nickel bloom, Ni 3 As 2 8 -f- 

 8H 2 ; scorodite, FeAs0 4 +2H 2 0. 

 IV. — Sulphides : 



Argentite, or silver sulphide, Ag 2 S ; millerite, or 

 nickel sulphide, NiS ; argyropyrite ? strom- 

 eyerite? (Ag, Cu) 2 S; bornite, Cu 5 FeS 4 ; chal- 

 copyrite, CuFeS 2 ; sphalerite, ZnS ; galena, 

 PbS ; pyrite, FeS 2 . 

 V. — Sulpharsenides : 



Mispickel, or sulph-arsenide of iron, FeAsS ; 

 cobaltite, or sulph-arsenide of cobalt, CoAsS. 

 VI. — Sulpharsenites : 



Proustite, or light red silver ore, Ag 3 AsS 3 ; 

 xanthoconite ? Ag 3 AsS 4 . 

 VII. — Antimonides : 



Dyscrasite, or silver antimonide, Ag B Sb ; breith- 

 auptite, NiSb. 

 VIII.— Sulphantimonites : 



Pyrargyrite, or dark red silver ore, Ag 3 SbS 3 ; 

 stephanite, Ag 5 SbS 4 ; polybasite? Ag 9 SbS 6 ; 

 tetrahedrite, or sulph-antimonite of copper, 

 Cu s Sb 2 S 7 ; freibergite? (silver-bearing tetra- 

 hedrite). 

 IX. — Sulphobismuthites : 



Matildite, AgBiS 2 ; emplectite, CuBiS 2 . 

 X. — Mercury : 



Amalgam ? 

 XI.— Phosphate : 

 Apatite. 

 XII.— Oxides : 



Asbolite ; heubachite? ; heterogenite ? ; arsenolite ; 

 roselite? 

 XIII. — Veinstones : 



Calcite, dolomite, aragonite, quartz, barite, 

 fluorite. 



