Of Metals. 
Part III 
between the Flakes, or in the Grain of a hard white Stone 5 
as the yellow Plates in the Ludus Helmontij, defcribed in 
the former Setlion. The feveral Plates are curioufly 
wrought with Striae, which obliquely decuflate each other, 
and make their Impreffion all along upon the Stone. This 
Stone is infenfible of Acids. In fome places, the Silver alfo 
lies crude in a black Ore. 
Pure Native SILVER, FLAKED, or as it were the Plated 
broken into feveral thin pieces $ lying alfo in the Grain of 
a white Spar, but diflbluble with Spirit of Nitre. 
Thick PLATED SILVER from the Mine 3 with a mix- 
ture alfo of Crude Silver Ore 3 both in a white Stone diflb- 
luble with Spirit of Nitre. 
WHITE SILVER ORE,or of a filver-colour,from Crem- 
nitz^ in Hungary. There are alfo fome parts of Black Ore 
mixed with it. And fome Cinnabar 5 partly of a Scarlet or 
Vermilion colour,and partly of the Lapis Hematites. Given 
by Dr. Edward Brown. 
Another piece of WHITE SILVER ORE, growing 
in a white Stone, having a blackifti caftin fome places, with 
the hardnefs of a Gem. 
YELLOW SILVER ORE, or near the colour of Gold, 
from Kottenberge in Bohemia. ? Tis granulated in a hard 
white Stone. In fome parts, alfo blackifti. ^ 
ANOTHER Piece, rather of the colour of Copper, from 
the fame place. It grows in a hard, black and white 
Stone. 
BLEW SILVER ORE, from the Silver-Mine o£ Bene 
Ferm. Not Granulated, but Flaked. In fome pofitions 
efpecially, of a curious blew, like that of Cicbory-Flowers, 
or fome blew Glafs, but much fairer. Some yellow Mun- 
dic^alfo, with a piece of Green Spar, grow to it on one 
fide. 
PURPLE SILVER ORE, with Cinnabar. 
GREEN SILVER ORE, The colour is fomewhat ob- 
fcure, but lies not only in the furface, but inward parts of 
the Ore. Here are growing to it fome of the Lapis Armenius, 
and yellow Okre. 
BLACK SILVER ORE, for the moft part Granulated 5 
from the Silver-Mine at Schemnit^ Given by Dr. Edward 
Brown. This fort js the beft. An 1 00 /. of Schemnitz^ Ore 
yields 
