23 



TAB. CXIII. 



FERRUM oxjgenizatum; Var. stalactiticurru 



Sialactitical Oxide of Iron. 



Class 3 . Metals. Order 1 . Homogeneous. 



Gen. 8. Iron. Spec. 3. Oxide of. 



D'w. 1. Imitative. 



1 his specimen of stalactitical haematitic Oxide of Iron is re- 

 markable for being so closely surrounded with Rock Crystal, 

 in a very curious situation. It is apparent that the Iron 

 has been precipitated in a very moist state, and was not 

 likely to penetrate the Rock Crystal, which therefore has sur- 

 rounded the Iron, and must evidently have been formed at 

 the same time with the Iron, or afterwards ; but this latter 

 is certainly most probable. 



This is the blackest state of Haematites, with the radiating 

 fracture, its common character. 



This specimen is from Cornwall, the rocks of which 

 country are generally supposed to be of primitive formation. 



