176 DESCRIPTIONS OF MINERALS. 
It occurs in crystals in New Hampshire, at Franconia, 
Jackson, and Haverhill ; i Maine, at Blue Hill Bay, Corinth, 
Newfield, and Thomaston ; in Vermont, at Waterbury; in 
Massachusetts, massive at Worcester and Sterling ; in Con- 
necticut, at Chatham, Derby, and Monroe ; in New Jersey, 
at Franklin; in New York, in Lewis, Essex County, and 
near Hdenville and elsewhere in Orange County ; in Kent, 
Putnam County. 
Leucopyrite. This is the name of arsenical iron Fe, As,. It re- 
sembles the preceding in color and in its crystals. J /\ [=122° 20’. 
It has less hardness and higher specific gravity. H.=5-5°5. 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,—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- 
By 
dron of 86° 10’ (fig. 1); crystals occasionally thin tabular. 
Cleavage usually indistinct. Often massive granular ; some- 
times Jamellar 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 éarthy 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.=4:0-9°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. 
