10 



DOMAIN I. SIDEROUS. 



which it may not be found. But the mixture of 

 siderite with felspar deserves a distinct appel- 



Grunstein. lation. The term grunstein or green stone, used 

 by Werner, has been deservedly ridiculed, as 

 alike vague and barbarous. He borrowed it 

 from the Swedes, whose grunstein was really 

 green. It is further objectionable, as he extends 

 it to green porphyry, and other mixtures of 

 earthy trap or basaltin. As many new appel- 

 lations are wanted, to distinguish with brevity 

 and precision the different kinds of rocks, it is 



Waiierite. proposed to call this mixture WALLERITE, in 

 honour of Wallerius, the great Swedish father 

 of mineralogy. The other kinds of grunstein 

 are arranged after basalt; as by their earthy 

 texture they differ greatly from the former : nor 

 can the black and green porphyry of the an- 

 cients, classed by Werner under this head, be 

 considered as having any other basis than com- 

 mon trap. 



STRUCTURE I. COMMON SIDERITE. 



Aspect 1. Uniform. Black siderite of Egypt. 

 This substance is more generally found mingled 

 with granite ; but scarabcei and other small sculp- 

 tures sometimes occur in it, and sometimes in that 

 ore of iron called hematites*. 



* See Wad, p. 8 and 32. 



