04) DOMAIN II. SILICEOUS. 



in due analog jr, to receive its name from the 

 same language. 



Granitel sometimes consists of as minute par- 

 ticles as granitin, so as to assume the appearance 

 of a coarse basalt. From this confusion, as 

 Wad observes, some of the Italians denote the 

 same substance granitello verde di Egitto, which 

 others call basalte verde. He describes two spe- 

 cimens*: " 1. Granite with very minute grains, 

 consisting of greyish white felspar, and siderite 

 of a dark green, in equal portions. 2. Granite 

 of a very small grain, composed of greyish white 

 felspar, and greyish black siderite, mixed with a 

 larger portion of olive-green siderite, which ren- 

 ders the rock green." 



^ r> Kirwan has justly observed, that the sim- 

 ple addition of mica to any stone, cannot alone 

 entitle it to be placed in the granitic division, as 

 mica does not form a grain, but attaches itself 

 indifferently to many sorts of stones ; for there 

 are micaceous limestones, micaceous sandstones, 

 micaceous serpentines, &c. &c. Mica must 

 therefore be totally excluded from the granitels; 

 and felspar with mica, or quartz with mica, can 



crane's bill, geranium ! But Pliny says himself, xxxvii. 1 1, a gruis 

 collo geranites. See Laet, p. 170, for a print of a Geranites. For 

 the first appearance of the word granito, see a former note. 

 * Fossil JEgyp* ? 7- 



