Siliceous Genus: 153 



All thefe ftones are called Gneifs> and are 

 generally of a lamellar texture. 



II. VARIETY, 

 AmygdaloideS) Mandelfteln of fame* 



This confifts of a chert or jafper ground, 

 in which fragments of calcareous fpar, and 

 ferpentine, of an oval form, are contained* 



III. VARIETY. 

 Vciriolite. 



This is faid to be a compound of all forts 

 of ftones, included in a ground of ferpentine. 

 Ferber, Italy, p. 120. 



IV. VARIETY. 

 Metallic Stone of Linn#us and Born. 



It confifts of Quartz, clay, and fteatites f 

 d is of different degrees of hardnefs, fome- 



times the fteatites is wanting, fometimes felt- 



fpar is found in it. 



V. VARIETY. 



>uartZi Spar, and Mica. Saxwn Angermanni- 

 film of IJtw&w, 



CHAP. 



