MINERALOGY. 
155 
the phlogifton, and therefore wholly 
uniting with that. 
SECT. CLIL 
Sulphur that has diffolved, or is faturated 
with metals. Sulphur metallis faturatum. 
I. With iron. Sulphur marte faturatum. 
Pyrites, or Copperas-ftone, Pyrites. 
This is the fubftance from which moft 
fulphur is prepared, and is therefore 
ranked here with all its varieties. It is 
hard, and of a metallic Ihining colour. 
a. Pale yellow Pyrites, Pyrites fuhflavus. 
Marcalite. 
This is very common, and contains 
a proportionable qpantity of fulphur 
with refpect to the iron when once 
thoroughly inflamed, it burns by itfelf. 
1. Of a compadl texture, ^extura 
aq^uali : PolitaPiedra del Tnca^ Hif- 
panorum, 
2. Steel-grained, TeDcturd chalyhed, 
3. Coarfe-grained, "T ex turd granulatd. 
4. Criftallifed, ChriHallifatus, 
It Ihoots moftly into cubical and 
odloedral figures, though it alfo 
criftallifes jnto innumerable other 
forms. 
SECT. CLIIL 
h Liver-coloured Marcafite, Pyrites co^ 
lore rubefcente. 
Its colour cannot be defcribed, be- 
ing betwixt that of the preceding 
marcafite, and the azure copper ore. 
When 
