MODE V. GRANITE. 



The granites near the Hermitage, in Dau- 

 phiny, which yields the famous wine so called, 

 often present specks of a greenish black mica in 

 the very heart of the crystals of quartz; being 

 palpably the same mica which is interspersed 

 through the granite. Sauss. 1621. 



A granite, which Saussure says is of a new 

 formation, crystallised in the crevices of mica 

 slate, mostly composed of felspar, partly also with 

 quartz and mica. 1267. 



A granite, of which the quartz is of a lavender 

 blue, the felspar of a yellowish white, and the 

 mica, which is rare, of a dull leaden colour. 

 2144. 



Granites with round crystals of felspar, like 

 that of Finland. 1195. 



STRUCTURE II. OF A SMALL GRAUi'. 



White granite, with black siderite, from Mount 

 Sinai. On this, according to tradition, the Laws 

 of Moses were engraved. 



Red granite of Egypt, passing in a vein through 

 grey granite, with patches of siderite, brought by 

 Roziere from the quarries of Syene. 



which, from the sharpness of their angles, and other symptoms, 

 seem even to have crystallised apart. These are, rose-colour with 

 green spots, black with white spots, green and white, grey with red 

 spots, brown with green veins. 



o 2 



