MODE II. KERALITE. 1J5 



With different laminar shades of black, but not 

 with a laminar fracture, from Giromagny in the 

 Vosges mountains, France*. 



Interspersed with native silver, from the famous 

 mountain of Schlangenberg, or Zmeof, in the south 

 of Siberia, which seems entirely to consist of rock- 

 flint, mixed with silver. 



From the great oriental chain of mountains in 

 Siberia, where, according to Patrin, it underlays 

 the ribbon jasper. 



With crystals of felspar it forms what Werner 

 styles horns tone porphyry, for which see the Si- 

 liceous Intrites. 



Aspect 2. Unctuous. There is also an unc- 

 tuous keralite, like what is called fat quartz. It 

 is sometimes mistaken for felsite. 



STRUCTURE II, LAMINAR. 



Aspect 1. The siliceous schist us of Werner, a 

 term very vague, as there are so many schisti of a 

 siliceous nature, is by Mr. Kirwan and others re- 

 garded as a schistose hornstone. It is a primitive 

 rock, usually of a greyish black, intersected with 



* In another work the author has said that, in the ancient 

 phraseology, forests and mountains were often confounded. Roeslin 

 de Sylva Pdsgovia (that is, an account of the mountains of Wasgaw, 

 or Vosges) is a modern example- 



