TO THE CAPITAL OF THE BANNAT. 309 
hundred and fifty. The mountains are entirely chap. 
composed of porphyry, covered with red clayy -'- > 
or red ars'illaceous schistus, and sandstone. The ,.^° "*^" 
vein rocks consist of red feldspar and white 
quartz, of that kind which is vulgarly called /a^ 
quartz '. The richer ores are laminary, splen- cji.^ager 
dent, of a dark grey colour, approaching to 
black, and in some instances quite black. The 
lamellae may be separated with a needle ; and 
they are malleable and ductile in a certain 
degree. There is also here found a very rich 
kind of ore, which is finely woven into the tex- 
ture of a reddish feldspar, resembling the arsenical 
white ore of Saxony. Among the rich ores, native 
silver sometimes occurs, mixed with gold. 
Another variety is called, by the miners, cotton 
ore: it consists of little native silvery gold 
grains, in tellurium, adhering to an argillaceous 
matrix. But in all the richer ores (which are 
so productive of precious metal, that the smallest 
particle being placed, with a little borax, upon 
the tube of a common tobacco-pipe, and sub- 
mitted to the blow-pipe, becomes easily reduced 
(i) Mineralogists have observed that the rarer minerals, those 
which are more highly prized than any other on account of their 
beauty and scarcity, associate with this kind of quartz, which is gene- 
rally their matrix ; such, for example, as the ores of Titanium, Molyb- 
denum and Uraniuyn, Tourmaline, Topaz, Pyrophysalite, Pycnite, dc. 
