T. S. Hunt on Lithology. 95 
ho greater than carbonate of lime. It is somewhat unctuous to 
the touch, with a feeble waxy lustre, and its color is occasionally 
reddish, but more often of a pale green. Such a specimen was 
a breadth of from four to seven feet. I enerally arranged 
in bands or layers parallel to the walls of the veins, and varying 
1n color from white to yellowish and flesh-r The mineral! has 
: TRACHYTES. 
Under this head we shall describe a class of rocks which are 
Idspar, These will be described as granitoid trachytes, under 
which head from 
