TAB. LXIV. 



FERRUM oxygenizatum. 

 Foliated Oxide of Iron. 



Class 3. Metals. Order I. Homogeneous. 

 Gen. 7- Iron. Spec. 3. Oxide of Iron. 



Syn. Plumbaginous or Micaceous Iron Ore. Kirw. 

 v. 2. 184. 

 Eisen-Glimmer. Emmerl. v. 2. 306. 

 Fer oligiste ecailleux. Haiti/, v. 4. 45. 



1 his curious variety of iron ore is found in Wales, Scot- 

 land, Cornwall and other places. It has the appearance of 

 iron with somewhat of the gloss and the blackish grey tint 

 of black lead, occasionally with the blue, purple, and some- 

 times the other iridescent colours. It is more or less flat^ 

 irregular or undulating, in very thin broad laminae, one over 

 another. They have two sets of parallel lines crossing each 

 other obliquely, and forming the plain of a rhomboid. It is 

 found in rocks of quartz, and the upper figure has some yel- 

 lowish mica about it. The right and left hand middle figures 

 show the parallel lines crossing some fragments, and the un- 

 dulating structure. It is not attracted by the magnet. It 

 is very brittle, and easily breaks into small irregular frag- 

 ments. 

 1 



