NOME V. FERRUGINOUS LUARTZ. 43 



basalt and granitel, may be considered as a gra- 

 dual approach to this intimate combination. 



NOME V. FERRUGINOUS QUARTZ. 



[ZOZIMITE, from Zozimus, one of the chief 

 Greek philosophers of Egypt, who wrote on al- 

 chemy, A. D. 420.] 



Near Sallenche, Saussure observed a rock, 

 with protuberances, of a lively red, like cinna- 

 bar. When broken with arhammer it proved to 

 be a micaceous ferruginous rock, with irregular 

 nodules of quartz, tinged red with iron. 



When the tender or micaceous part of this 

 stone was exposed to the flame of the blow-pipe, 

 it melted into a greenish and almost transparent 

 glass; but the hard and quartzy parts scarcely 

 suffered any change, except there were some 

 free ferruginous particles, which in that case 

 melted, and formed a black and brilliant dross, 

 on the surface of the stone ; but when the co- 

 louring part is intimately combined with this 

 stone, it remains red and untouched*. 



* Sauss. 1134. 



