MODE XII. MAGNESIAN GLUTENITE. 373. 



A steatitic rock, with crystals of rose-co- 

 loured felspar. 154. 



He describes, 1437, what he calls a serpen- 

 tine porphyry, but really an intrite with small 

 crystals of actinote. 



A hard green serpentine, with spangles of a 

 brighter green, semi-transparent, and resembling 

 wax; being seemingly a secretion, or confused 

 crystallisation, of the purest parts of the stone. 

 May not the same remark be applied to porphy- 

 ries, &c. ? 959. 



Steatite, crystallised in ollite, the crystals be- 

 ing laminar, and of a grey inclining to green. 

 1851. 



MODE XII. MAGNESIAN GLUTENITE. 



This Mode presents, as usual, two Structures, 

 the large and the small grained. 



STRUCTURE I. LARGE-GRAINED. 



A late ingenious writer gives the following ac- 

 count of two curious magnesian bricias, the latter 

 however being more strictly a pudding-stone. 



" 1. Steatitic bricia of Corsica. This Hricia, 

 the steatitic base of which is of a reddish white, 

 contains fragments of the same substance, which 





