470 



ANNUAL REPORT OF THE 



Off. Doc. 



for bornite and niccolite, as some specimens of these resemble pyrrho- 

 tite. A test with the magnet will quickly settle the question of its 

 identity. 



Marcasite has the same chemical composition but differs from 

 pyrite in appearance and form of crystals. Its color, when freshly 

 fractured, is lighter or paler. Its streak is black. It decomposes 

 more readily when exposed to atmospheric influences. Both the 

 pyrite and marcasite are used for the same purposes. 



PRODUCTION 



The production of iron pyrite in the United States, its value, and 

 the price per long ton for three years is exhibited in the following 

 table: 



MINERAL RESOURCES OF THE UNITED STATES 



Marketed Production of Pyrite in the U. S., 1912-1914, by States, in 

 Long Tons. 



California, 



Georgia, 



Illinois, 



Indiana, 



Ohio 



Virginia 



Wisconsin, 

 Otlier States, t 



Total, ... 



1218,525 



55,034 



31,966 



3,115 



34,998 



587,041 



94,72f7 



260, S18 



$1,286,084 



State. 



California, 



Georgia 



Illinois 



Indiana 



Ohio 



Virginia, 



Wisconsin, — 

 Other States, t 



Total, . . . 



$3 20 



* 



2 62 



3 09 



2 71 



3 94 

 5 53 



4 20 



$3 81 



♦Included in "Other States." 

 tl9ia: Georgia, Missouri, New York and 

 Georgia, Missouri and New York. 



Pennsylvania; 1913 Missouri and New York; 1914: 



