■ht SYSTEM OF 
SECT, LXVIII. 
Tke Third Order. 
The Garnet Kind, ‘Terra Granatea. 
The matter compofing the ibbftance of garnet,, 
and fchorl or cockle, except that fmall portion 
which is metallic, does in its indurated Hate re- 
femble the filiceoiis tribe, fo far as relates to 
external appearance and hardnefs and therefore 
I woidd willingly have followed the opinion 
commonly received, of conlidering thefe two 
fubffances as ariiing frpm one another, if I had 
not l>een perfuaded to the contrary by the fob 
ipwing qualities of the garnet. 
, It is more fufible, in proportion as it con- 
tains lefs metallic matter, and is more 
tranfparent or glafiy in its texture; which 
is quite contrary to the filiceous kind. 
2. This is the reafon, perhaps, why the gar- 
nety mixed v/ith the fait of kelp, may on 
a piece of charcoal be converted to a glafs 
by the blow-pipe, which cannot be done 
with the Hints : and, 
3> Why the moil tranfparent garnet may, 
without any addition, be brought to a black 
/ opaque flag by the fame means. 
4. It is never, fo far as is hitherto known, found 
pure, or without fome mixture of metal ; 
and efpecially iron, which may be extracted 
by the common methods. 
e:. The garnet matter, during the criftallifa- 
tion, has either been formed in fmall de- 
tached quantities, or elfe has had die. 
power of fliooting into criftals, though 
clofdy 
