PHYSIOGRAPHY. 



Epidote. 



183 



Fig. 170. 



M 



Franconia, (N. H.) 



M on T 

 T on T' 



115 36' 

 129 35 



a on a' 



109 24' 



Several varieties consist of concentric coats, the outer 

 ones of which being pealed off, leave a crystal with smooth 

 faces. Massive : composition granular, of various sizes of 

 individuals, sometimes impalpable, strongly connected : co- 

 lumnar, straight, and either parallel or divergent, or irregu- 

 lar, and of various sizes of individuals. 



1. Epidote includes Zoisite, or the grey and whitish colored varieties 

 oC the present species, and which by some mineralogists have been treat- 

 ed of, as constituting a separate species. The light reddish-black variety 

 from Piedmont, called the Manganesian Epidote, is Zoisite tinged by ox- 

 ide of manganese. 



2. Before the blow-pipe, the varieties of Epidote intumesce, and part- 

 ly exfoliate, but are with difficulty brought to the condition of a transpa- 

 rent glass. Those with much iron are more easily fused than the rest. 

 With borax, Epidote first intumesces, and then yields a clear globule. 



3. Analysis. 



