40 
SALOON. 
Nat. Hist. 
contains much silica.—To the silicates of copper 
may likewise be referred the dioptase, a very scarce 
substance from Siberia, also called emerald copper, 
on account of its pure green colour ; and the very 
scarce sky blue velvet copper ore.—Phosphate of 
copper from Nassau and Hungary .—Muriate of 
copper , crystallized and laminar: to which also be¬ 
longs what is called green sand of Peru, or atacct- 
mite, from being found in the desert of Atacama, 
between Chili and Peru, as sand of a small river. 
The rest of this case is occupied by the principal 
varieties of the different arseniatcs of copper , 
namely, the foliated arseniate, or copper mica, the 
lenticular arseniate, or lentil ore, and the olive ore 
of Werner, which are formed into five distinct 
species by some mineralogists. (A greater variety 
of arseniates of copper will be found in the collec¬ 
tion of British minerals : Cornwall.) 
(Case 36 and part of 37.) contain, besides the 
arsenical iron (called also arsenical pyrites and 
mispickel), the sulphurets or iron, viz. the common, 
smooth and striated ; the radiated pyrites, a sub¬ 
stance very subject to decomposition, and to which 
belong most of the varieties of what is commonly 
called lenticular and coxcomb pyrites, as also the 
globular pyrites of a radiated texture. 
(Case 37.) Sulphurets of copper continued : 
—The hepatic or liver pyrites of Werner, very di¬ 
stinct from what French mineralogists call fer sul- 
fure 
