424 
DESCRIPTIVE MINERALOGY. 
Erie County. According to Mr. Yanuxem, minute quantities of copper pyrites are found 
at Black-Rock, and elsewhere in this county. By decomposition, it gives rise to stains of the 
green carbonate of copper. 
Herkimer County. Near Salisbury corners, the excavations in the calciferous sandstone 
have furnished small specimens of copper pyrites, with those of iron pyrites, zinc blende and 
galena.* It is almost impossible, however, to obtain specimens at the present time. 
Jefferson County. Minute specimens of this ore of copper were, a few years since, 
found on the banks of Muscolunge lake in the town of Alexandria. 
Niagara County. Small particles of copper pyrites and green carbonate of copper occur 
in the grey band at Lewiston ;f and it is also said to have been found in Oneida county. 
Orange County. Copper pyrites is found in small quantities, associated with the arsenical 
minerals which occur near the village of Edenville. It is also found at the O’Neil iron mine 
in the town of Monroe. 
Putnam County. In the gneiss rock at the Phillips iron mine, eight miles northeast of 
Coldspring landing, small masses of pyritous and green carbonate of copper are occasionally 
found with iron pyrites. 
St. Lawrence County. This mineral occurs at several localities in this county. One of 
these is about five miles from Rossie, beyond De Long’s mill. Several tons were raised at 
this mine in searching for a bed of iron ore, and it has been thought to be a rich vein. Ano¬ 
ther occurs near Canton, where the ore is found in thin beds, apparently between the layers 
of limestone, nearly in a horizontal direction. These ores yield about twelve per cent, of 
metallic copper.} 
Fig. 507. 
Fig. 506. 
At the Rossie lead mine, specimens of 
crystallized copper pyrites have been found 
in the galena. They exhibit trihedral termi¬ 
nations, a little rounded like some crystals 
of calcareous sjoar. Also the forms repre¬ 
sented in Figs. 506 and 507, of which the 
latter is a twin, composed of about equal 
parts of an octahedron, one half of which is 
turned half round. 
V 71° 10'. 
P on P' 125° 30*; l on 
Sullivan County. 
Fig. 508. 
This mineral occurs in considerable abundance, associated with galena 
and zinc blende, at the mine near Wurtzborough. It is found both 
crystallized and massive. It has a beautiful tarnish, and is sometimes 
coated with green carbonate of copper. The crystals are in the form 
of the octahedron with the modification represented in Fig. 508, but 
they are seldom perfect. P on c 140° 30k The gangue is quartz, 
which is both massive and crystallized. 
* Vanuxern. New-York Geological Reports, 1838. 
t Hall. Ibid. 1838. 
% Emmons. Ibid. 1838. 
