82 MINERALS OF CHILE. 



WHITE ANTIMONY 



Accompanies the last-mentioned mineral in several of its local- 

 ities. It has been found massive; is of a snow-white color, 

 with sometimes a reddish hue. We have no analysis of this 

 mineral from any of the localities in Chile. It is an oxide 

 of antimony, and when pure should consist of 



Antimony 84.32 



Oxygen 15.68 



Its formula is Sb O 3 . 100.00 



ANTIMONY GLANCE. 



This is also found in the localities furnishing native anti- 

 mony, with all the ordinary properties of this well-known 

 mineral. Its composition is 



Antimony 72.89 



Sulphur 27.12 



Its formula is Sb S 3 . 100.00 



NATIVE ARSENIC. 



This substance occurs abundantly in the provinces of Ata- 

 cama and Coqnimbo. It is of a tin -white color that soon 

 tarnishes; it is volatilized completely by the action of heat, 

 and possesses all the other peculiarities of this metal. It often 

 contains a little antimony and iron. It accompanies ores of 

 silver, particularly ruby -silver, antimonial and sulphuret of 

 silver, native silver, arsenical cobalt, arseniuret and sulpho- 

 arseniuret of iron. 1 am not informed of the existence of any 

 other arsenical minerals in Chile, but presume the oxide and 

 sulphuret must also be found. 



BLENDE SULPHURET OF ZINC. 



This ore of zinc is found near the Leona mine in Eancagua. 



Specimens examined by M. Domeyko contained a notable 



amount of iron; one of his analyses is as follows: 



Zinc 43.0 



Iron 12.4 



Sulphur 28.6 



Gangue 14.7 



97.7 



Its formula is Zd S, with iron sometimes replacing a portion 



of the zinc. 



