P?a r t III. Of Antimony , Mercury , 
The PENTAGONATE Marcbafite. About the bignelT 
of a little Gall 5 fomewhat round, defined with feveral fides, 
each with five Angles. 
A Tuberated Marchafite with a Green Spar. 
A MARCHASITE growing to its o wn Spar, together 
with a white one pointed and femiperfpicuous. 
A Mixed MARCHASITE. It confiffeth of yellow pieces 
partly cubick, and partly flaked: with Lead-Ore holding 
Silver growing to it on one fide 3 on the other, feveral fets 
of afh-colour’d Flakes growing together in the form of little 
Rofes. 
As all Metals, fo Marcbafites have their SPARS, called 
Fluores. Both becaufe they melt in the fire; and make the 
Ores to which they belong, to melt the better. The rea- 
fon whereof is, For that in all Spars, there is a certain Salt 
which lies more loofe and open, and which in mixing with 
the Ore, frets and tears it all to pieces. 
APiece of WHITE MUNDICK. 
WHITE MUNDICK ORE, immerfed in Grains in an 
afh-colour d Stone. 
GREEN MUNDICK, or MundickJOre , running in Veins 
in white Clay. 
A large fphterical and knobed FIRE-STONE, or Pyrites, 
about two inches in Diametre. 
Another, of the fame Figure, as big as a Walnut, and. of 
an Iron-colour. 
A Piece of a large one of the fame Figure, and with a 
black furface. The whole Body is radiated from a Vitrio- 
lick Centre or Pith about * of an inch in Diametre. Which 
radiation is alfo feen in mod Fire-Jlones. 
Another whole of the fame form, a little Iefler. 
A Round PYRITES, comprefled. Another lefTer. 
A PYRITES, partly Cylindrick, and partly Oval 5 Cy J 
lindr waits. ’Tis two inches long, and near an inch and ; 
over 5 Cylindrick in the middle, and Oval at both ends. 
The Surface, fmooth, and of a (Fining black. 
MUNDICK ORE, as it may be call’d 5 having the 
fame Analogy to that which is figur’d; as the Ores of Metals, 
have to fuch as are pure and perfect. This is for the moft 
part of a greenifh afh-colour, not very hard, and fomewhat 
gritty. 
X x Yellow 
357 
