ORDER X. PYRAMIDAL COPPER-PYRITES. 4G9 



only in veins. It is accompanied chiefly by various other 

 ores of copper. 



4. At Orawitza and other places in the Bannat, the oc- 

 tahedral Copper-pyrites occurs in beds, and is very fre- 

 quently associated with dodecahedral Garnet. It is found 

 likewise in beds in the cupriferous shale of the Mansfeld, 

 included in thin layers in the bituminous marl-slate. Seve- 

 ral of the Saxon veins contain varieties of it ; but it is par- 

 ticularly found in Cornwall, which contains the only loca- 

 lities where crystals have been discovered, in the vicinity of 

 Redruth. In smaller quantities it is found also in Ireland, 

 Hessia, Silesia, in Norway and Sweden, in Greenland, &c. 



5. It is a valuable mineral for extracting copper. 



2. PYRAMIDAL COPPER-PYRITES. 



Octahedral Copper-Pyrites or Yellow Copper. Pyrites. 

 JAM. Syst. Vol. III. p. 310. Pyramidal Copper-py- 

 rites. Man. p. 275. Copper Pyrites. Yellow Copper 

 Ore. PHILL. p. 302. Kupferkies. WERN. Hoffrn. H. 

 B. III. 2. S. 113. Genieiner Kupferkies. HAUSM. I. 

 S. 1C2. Kupferkies. LEONH. S. 258. Cuivre pyriteux. 

 HAUY. Traite', T. III. p. 529. TabL comp". p. 85. 

 Traite', 2de Ed. T. III. p. 432. 



HAIDINGER. Mem. Wern. Soc. VoL IV. p. 1. PHILL. 

 Ann. of PhiL Vol. III. p. 296. 



Fundamental form. Isosceles four-sided pyramid. 

 P = 109 53', 108 4(X. Vol. I. Fig. 8. R. G. 



Simple forms. P CD (a) ; P 4 (d) = 155 6', 

 38 25'; P 2 = 132 19', 69 44' ; P 1 

 (b) = 120 3(7, 89 9 / ; P (P F) Alston, Cum- 

 berland ; P + 1 (c) = 101 49/, 126 11' ; P + 2 

 = 96 33', 140 31' ; P + x ; ^ P 3 (e) 

 = 146 20', 49 5<y ; -p P 2 (g) = 134 !</, 

 6G 36'; r ;- P (/O = 1081S', 111 50'; [P+ ooj; 

 (P + x) 3 = 126 52' 12", 143 T 48". 



