Mineralogy and Geology. 125 
high temperature, and even the action of minerals and other acids, far 
beyond the celebrated verd antique of Italy. When highly polished, it 
is a rich and beautiful green marble, veined with white, and sometimes 
is richly mottled with magnesite and dolomite spar. Its polished surface 
is not liable to erosion from atmospheric causes, and will offer no hold 
for lichens, mosses, or other parasitic vegetation, which so frequently 
mar the beauty of our more open grained white monumental marbles. — 
Ist. Chemical analysis of the white veins of European verd antique. 
These veins, picked out with great care to avoid any mixture of particles 
of serpentine, yielded per cent— 
Carbonate of lime, — - - - 81-00 
_ Carbonate of magnesia, — - - - 1170 
Carbonate of iron, = - - - 7°30 
100°00 
2d. Chemical analysis of the white veins of Roxbury, Vermont, verd 
antique marble, ese veins were quite common in the slabs examined 
yme. They were picked out with care to avoid any admixture of ser- 
pentine. On analysis they yielded— 
Carbonate of magnesia, - - 80°00 
Carbonate of lime, - - - 15°00 
Carbonate of iron - - - 3°50 
y : ois Yee 
Silica and loss, 
yielded per cent— 
Magnesia” § -... > - - 38°88 
Carbonic acid, —- - - =: OL AG me 
Protoxyd of iron, - - - 9-00 
ndecomposed serpentine, - “- 15°00 
00°00 
i . . . * ay 
The totoxyd of iron was originally in combination with carbonic acid 
; P be 
-In the stone, forming carbonate of iron, an isomorph with carbonate of 
a . 
magnesi ee . « - 
4th. Chemical analysis of the dolomite spar veins in Roxbury, Vt. 
Serpentine.—A cleavage erystal, with angles of 106°15°, was analyzed, 
and yielded— 
Carbonic acid rs 4 “ 46°50 
ees 
agnesia, = . " : 
Protoxyd of iron, =~ == . - i 
Silica, - oo bad ” 0 5 
