ENDLicH.] SYSTEMATIC AERANGEMENT OF COLORADO MINERALS. 155 



SYSTEMATIC ARRANGEMENT OF COLORADO MIN- 

 ERALS.* 



Gold (1). 

 Silver (2). 

 Quicksilver (8). 

 Amalgam (9). 

 Copper (12). 

 Irou (13), 



I. :n^ative elements. 



Lead (15). 

 Antimony (18). 

 Bismuth (20). 

 Tellurium (21). 

 Sulphur (22). 

 Graphite (25). 



IL SULPHIDS, TELLURIDS, SELBNIDS, AESENIBS, AKTL 

 MONIDS, BISMUTHIDS. 



Stibnite (29). 

 Bismuthiuite (30). 

 Molybdenite (34). 

 Dyscrasite (35). 

 Schapbachite (36 A). 

 Argentite (40). 

 Galenite (44). 

 Alta'ite (48). 

 Boruite (49). 

 Alabandite (52). 

 Sphalerite (56). 

 Hessite (58). 

 Chalcocite (61). 

 Stern bergite (63). 



Zinkenite (106). 

 Jamesonite (112). 

 Schirmerite (112 A). 

 Freieslebenite (114). 

 Pyrargyrite (117). 

 Proustite (118). 



A. SIMPLE SULPHIDS, &C. 



Pyrrhotite (68). 

 Greenockite (69.) 

 Schreibersite (74). 

 Pyrite (75). 

 Ohalcopyrite (78). 

 Ohloanthite (83.) 

 Marcasite (90). 

 Leucopyrite (91). 

 Arsenopyrite (94). 

 Sylvauite (98). 

 Calaverite. 

 Nagyagite (99). 

 Covellite (100). 



B. DOUBLE SULPHIDS, &C. 



Bournonite (119). 

 Tetrahedrite (124). 

 Tennantite (127). 

 Stephanite (130). 

 Polybasite (131). 

 Enargite (132). 



III. COMPOUNDS OF CHLOEINE, BROMINE, IODINE. 



Halite (138). 

 Cerargyrite (140). 

 Embolite (141). 



lodyrite (143). 

 Carnallite (147). 

 Atacamite (153). 



* The classification herein adopted is that given b^ Dana in his " System of Miner- 

 alogy." The numbers placed in parentheses after the mineral-names, correspond to 

 the numbers given by Dana. 



