Prof. Naumann on Mineralogical Classificatioti. 47 



C. Sulphur Glances. 



(«) Containinri chiefly Lead or Antimony. 



Lead-Glance Bournonite 



Steinmannite Zinkenite 



Geokronite Jamesonite 



Boulangerite Feather-Ore 



Embrithite Berthierite 



Plagionite Antimony- Glance 



{i>) Containing Molyhdena, 



Molybdena-Glance. 



(c) Containing Bismuth. 



Bismuth-Glance Needle-Ore 



Copper- Bismuth Bismuth- Silver-GIan ce 



{d) Containing chiefly Silver, 



Lead-Silver-Glance (Schil/glaserz) Silver-Glance 

 Sternbergite Melane-Glance 



Eugene Glance Copper Silver-Glance 



(c) Containing Copper. 



Copper-Glance Antimony-Copper-Glance 



Copper- Antimony-Glance 



CLASS XII. PYRITOIDES (PYRITES).-Sulphurets and arseniurets 

 of metals ; chiefly of a yellow, white, or red, rarely of a grey or black 

 colour ; and of a metallic habitus ; brittle ; hardness for the most part 

 greater than that of calcareous spar, and reaching that of felspar. 



(a) Containing principally Silver. 



(b) Containing Copper. 



Fahlerz Variegated-Copper 



Tennantite Copper-Pyrites 



Copper- Blende Weisskup/erkies 



(c) Ccmtaining Tin. 

 Tin Pyrites. 



((i) Containing Iron. 



Arteneisen (2 species) Rhomboidal Iron Pyrites 



Arsenical Pyrites Hexahedral Iron Pyrites 



Magnetic Pyrites 



(e) Containing Cobalt, 



Olanzkobalt (Hexahedral Cobalt Tesseral Pyrites (Arsenkobalt- 



Pyrites) kies) 



^peiskobalt (Octahedral Cobalt Sulphuret of Cobalt (Isometric 



Pyrites; Cobalt Pyrites) 



