^5% A SYSTEM OF 
The Granites are feldom flaty or la- 
minated, when their texture is clofeo, 
and the harder particles, as the felt» 
fpat . or rhombic quartz, the quartz, 
and the Ihiri, predominate in it. 
They admit of a good polifh, for 
which reafon the Egyptians in former 
times, and the kalians now, work 
them into large pieces of ornamental 
architefture, for which purpofe they 
are extremely fit, as they do not de- 
cay in the air. 
SECT. CCLXXI. 
2 . Conglutinated Saxa, Saxa conglutinata, 
A- Of larger or brolcen pieces of Hones of 
the fame kinds conglutinated together, 
Saxum coiiglutinatum fragmentis kipidum. 
Breccia. 
I. Of limeftone cemented by lime, Saxum . 
conftans fragmentis lapidis calcarei^ cake 
congliitlnatis. 
a. The calcareous Breccia, Breccia cal- 
car ea : The Marmi Brecciati of the 
Italians. 
When thefe kinds have fine colours, 
they are polilhed and employed for 
ornaments in architedure, and other 
csconomical ufes ^ they come from 
Italy. 
h. The of the Italians, or Ihell 
marbles. Thefe are a compound of 
fhells and corals, which are petrified or 
changed into lime, and conglutinated 
with a calcareous fubilance. \¥hen 
they have many colours^ they are cal- 
led 
