152 



DESCRIPTIONS OF MINERALS. 



Obs. Leadhills, "Wanlockhead, and other lead mines of 

 Europe are foreign localities. In the United States, very 

 handsome crystallized specimens occur at King's Mine, in 

 Davidson County, X. 0. ; other localities are the Perkiomen 

 and Phcenixville mines, Pa. ; the Lubec lead mines, Me. ; 

 Lenox, N. Y. ; formerly, a mile south of Sing Sing, N. Y.; 

 aud the Southampton lead mine, Mass. 



The name pyromorp kite is from the Greek pur, fire, and 

 morplie, form, alluding to its crystallizing on cooling from 

 fusion before the blowpipe. 



Mimetite. A lead arsenate, resembling pyromorphite in crystalliza- 

 tion, but giving a garlic odor on charcoal before the blowpipe. Color 

 pale yellow, passing into brown. H.=2'75-3-5. G.=6 - 41. Com- 

 position, Pb 3 8 As, -\-}.< Pb dg= Arsenic pentoxide 23*20, lead oxide 

 74*96, chlorine 2-30=100-55. From Cornwall and elsewhere; Phce- 

 nixville, Pa. 



Hedyphane is a variety of mimetite containing much lime. It 

 occurs amorphous, of a whitish color, and adamantine lustre. H. = 

 3-5-4. G. =5-4-5-5. 



Karyinite. A lead arsenate containing manganese and calcium, 

 from Norway. 



Ecdemite. A lead chloro-arsenate. 



Yanadinite. A lead vanadate occurring in hexagonal prisms like 

 pyromorphite, and also in implanted globules. Color yellow to red- 

 dish brown. H. =2 75-3. G. =6-6-7 '3. From Mexico; also from 

 Wanlockhead in Dumfriesshire. 



Monimolite. A yellow lead antimonate. 



Nadorite. A yellow lead chlor-antimonate. 



Bindlieimite. A hydrous lead antimonate. 



Oerussite. — "White Lead Ore. Lead Carbonate. 



Trimetric. In modified right rhombic prisms, and often 

 in compound crystals, two or three crossing one another as 



1. 



in fig. 2. I a 7=117° 13'. Also in six-sided prisms like 

 aragonite. Also massive ; rarely fibrous. 



Color white, grayish, light or" dark. Lustre adamantine. 

 Brittle. H. = 3-3 -5. G. = 6 -46-6 -48. 



