176 DESCRIPTIONS OF MINERALS. 



It occurs in crystals in New Hampshire, at Franconia, 

 Jackson, and Haverhill ; in Maine, at Blue Hill Bay, Corinth, 

 Xewfield, and Thomaaton ; in Vermont, at Waterbury ; in 

 Massachusetts, massive at Worcester and Sterling ; in Con- 

 necticut, at Chatham, Derby, and Monroe ; in i\ T ew Jersey, 

 at Franklin ; in Xew York, in Lewis, Essex County, and 

 near Edenville and elsewhere in Orange County ; in Kent, 

 Putnam County. 



Leucopyrite. This is the name of arsenical iron Fe 2 As 3 . It re- 

 sembles the preceding in color and in its crystals. / A I—122 z 20'. 

 It has less hardness and higher specific gravity. H. =5-55. G.=7'2 

 -7*4. Contains Iron 32-2, arsenic 66 '9, with some sulphur. From 

 Styria, Silesia, and Carinthia. 



Lollingite is another iron arsenide, Fe As 2 =Arsenic 72 - 8, iron 27*2 ; 

 specific gravity 6 -8-8*71. Berthierite is an iron sulphantimonite. \ 



Hematite. — Specular Iron Ore. Iron Sesquioxide. 



Rhombohedral. In complex modifications of a rhombohe- 



1. 2. 3. 



dron of 86 c 10' (fig. 1); crystals occasionally thin tabular. 

 Cleavage usually indistinct Often massive granular ; some- 

 times lamellar or micaceous. Also pulverulent and earthy. 

 Color dark steel-gray or iron-black, and often when crys- 

 tallized having a highly splendent lustre ; streak-powder 

 cherry-red or reddish -brown. The metallic varieties pass 

 into an earthy ore of a red color, having none of the external 

 characters of the crystals, but perfectly corresponding to them 

 when they are pulverized, the powder they yield being of a 

 deep red color, and earthy or without lustre. G-. =4*5-5 -3. 

 Hardness of crystals 5 *5-6 *5. Sometimes slightly attracted 

 by the magnet. 



VARIETIES. 



Specular iron. Having a perfectly metallic lustre. 

 Micaceous iron. Structure foliated. 

 Red hematite. Submetallic, or unmetallic, and of a brown- 

 ish-red color. 



Red ochre* Soft and earthy, and often containing clay. 



