PHYSIOGRAPHY. 235 



Green Malachite. 



GREEN EARTH. (See Talc.) 

 GREEN IRON-ORE. 



Massive : reniform and fibrous. 



Lustre vitreous, silky. Feebly translucent upon the edges. 

 Color dark lake-green ; the decomposed fibres, yellowish or 

 brownish. 



1. It yields water on being heated, and melts very easily into a black- 

 porous slag, which is not magnetic. It is soluble in muriatic acid. 

 2. Analysis. 

 By KARSTENV 



Phosphoric acid -..''- - - 28 50 



Oxide of iron - - - 62-52 



Water .... 898 



3. It occurs in the Hollester mines near Siegen, in Prussia. 



GREEN LEAD-ORE. (See Pyromorphite.) 



GREEN MALACHITE. Habroneme Copper- 



Baryte. 



Primary form. Oblique rhombic prism. M on M'= 

 103 42'. P on the obtuse edge of the prism =118 II 7 . 



Secondary form. The primary, having the obtuse edge 

 of the prism truncated. 



Cleavage, highly perfect in the direction of P ; that par- 

 allel with the obtuse edge of the prism, or longer diagonal, 

 less distinct. Fracture conchoidal, uneven, scarcely ob- 

 servable in crystallized varieties. The secondary plane 

 upon the obtuse edge sometimes streaked, the other faces 

 smooth. 



Lustre adamantine, inclining to vitreous. Color grass- 

 green, emerald-green, verdigris-green. Streak green, rath- 

 er paler than the color. Translucent, sometimes only on 

 the edges. 



Brittle. Hardness =3-5 . . . 4-0. Sp. gr. =4-008. 



