IRON. 



391 



The above crystals often have a high lustre, and do not suffer any change by exposure to 

 the atmosphere. 



This is undoubtedly one of the most remarkable deposits of iron pjrrites in the United States, 

 whether we consider the abundance of the specimens, or the perfection and interest of the 

 crystalline forms. 



Suffolk County. This mineral occurs in several places, associated with lignite, as in 

 Richmond county. According to Mr. Mather, it is most abundant at the clay pits on West 

 neck and Little neck near Huntington. 



Sullivan County. Cubic crystals, of a brass yellow colour, are found associated with 

 galena, zinc blende and copper pyrites at the mine two miles northeast of the village of Wurtz- 

 borough. The crystals sometimes exhibit the form of the cubo-dodecaedre (Fig. 458). 



Warren County. Johnsburgh and Chester furnish some highly modified forms of iron 



pyrites. At the latter locality, it is often 



Fig. 461. 



Fig. 462. 



accompanied by tourmaline and rutile. 

 The crystals from Johnsburgh have a pale 

 yellow and bronze colour, and a finish 

 equal to any found in the State. The 

 forms are the dodecahedron with penta- 

 gonal faces (Fig. 450) ; and also those 

 represented in Figs. 461 and 462. d on 

 e 140° 46' 7''; e on e 126° 52' 12"; e 

 on e' or e" 113° 34' 41" ; F on d 125° 

 15' 52" ; P on e 153° 26' 5" {Hauy). 

 Westchester Coustty. Iron pyrites, having the cubical form, and of great brilliancy, is 

 found in thin veins of calcareous spar in gneiss, on the Croton aqueduct near Yonkers. The 

 gneiss usually gives out a very fetid odour, which is probably to be ascribed to its being 

 impregnated with minute particles of this mineral. 



It also occurs in small dodecahedral crystals, similar to those at Kingsbridge, in the white 

 limestone at Sing-Sing. And the hepatic variety is said to have been found in large quanti- 

 ties at Anthony's Nose, mingled with common pyrites and phosphate of lime.* 



Ulster County. Small dodecahedral crystals of iron pyrites (Fig. 450), occur in a kind 

 of water limestone at High falls in the town of Marbletown. They exactly resemble those 

 from Schoharie. According to Mr. Mather, these crystals are contained in a slaty limestone 

 underlying the cement rock.t 



There is a fine locality of crystallized iron pyrites in Shoreham in Vermont, where it occurs 

 in the dark coloured limestone. 



 Fierce and Torrey. CleavelaruTs Minerahgj. 



i New-York Geological Reports, 1840. 



