MODE I. SIDERITE. 



the earth of green hornblende. Compact and slaty 

 siderite also frequently occurs, in large masses, in 

 common slate, a kindred rock. 



Aspect 1. Uniform. Schistose siderite, of a 

 beautiful silky texture, from Kongsberg in Nor- 

 way. 



Schistose siderite, from Holy head. 



The same, delicately waved, from Norway and 

 the Highlands of Scotland. 



Aspect 2. Mingled. Schistose siderite, with 

 garnets, from Kongsberg. 



The same, with native gold and silver, from 

 the same. 



The same, with particles of quartz, from Saxony. 



Schistose siderite in divergent rays, sometimes 

 of a fascicular sometimes of a starry form, from 

 the Alps, where it is often imbedded in granular 

 felspar. This rock will seldom admit of a polish, 

 otherwise it might rival the Miagite, the arborescent 

 granitel found in the ruins of Rome, and other 

 splendid and celebrated mixtures of felspar and 

 siderite, which are here classed amongst the ANO- 

 MALOUS ROCKS. 



Saussure describes different kinds of schistose 

 siderite in the following terms : 



" The schistus composed of hornblende and 



