DOMAIN IV. TALCOUS. 



serpentine, as probably does the bisachino of 

 Sicily. A green marble, resembling the verde- 

 anticoy is also found at Grenada, in Spain. 



What is called at Paris marbre (TEcosse is a 

 serpentine, from Portsoy. But one of the most 

 beautiful green marbles yet discovered is that of 

 of Angiesea. Anglesea, which sometimes resembles the verde- 

 antico; in other parts is interlaced with rose- 

 coloured veins; and in others variegated with 

 red and green of dissimilar intensity. It would 

 appear, as already mentioned, that even the cal- 

 careous parts are much impregnated with mag- 

 nesia, or, in other words, are Dolomite. This 

 marble was long since described by Da Costa, 

 and latterly by Coquebert. 



MODE XI. MAGNESIAN INTRITE. 



i 



Serpentine The chief rocks of this description hithert 

 observed, are what have been called pot-stone 

 and serpentine porphyries, the latter being found 

 near Florence. The base is of the usual colours 

 of these two substances, interspersed with larger 

 or smaller crystals of felspar. 



Magnesian intrites also exist with crystals of 

 quartz, or calcareous spar. 



To this Mode may be referred the following 

 rocks, described by Saussnre : 



