156 



PHYSIOGRAPHY. 



Red Copper-Ore. 



11. Fig. 378. 



12. Fig. 379. 



Pon P 

 P on a 

 P on b 

 a on b 

 e on e 



109 30' PHILLIPS. 

 125 10 " 



160 42 i 



144 38 " 



120 00 " 



Cleavage, parallel with the primary planes, but much 

 interrupted. Fracture conchoidal, uneven. Surface gen- 

 erally very smooth and shining, and every where the same. 



Lustre adamantine, sometimes metallic adamantine, or 

 imperfectly metallic. Color between cochineal-red, and in 

 capillary crystals almost carmine-red. Streak several shades 

 of brownish-red, shining. Semi-transparent . . . translucent 

 on the edges. 



Brittle. Hardness = 3-5 . . . 4-0. Sp. gr. ^=8*992. 



Compound Varieties. Massive : composition granular, 

 individuals of various sizes, or even impalpable. In the 

 latter case, fracture becomes flat conchoidal, or even, the 

 surface of the fracture glimmering. Sometimes earthy. 



1. Those varieties which consist of friable particles, and present an 

 earthy fracture, and which are besides often mixed with oxide of iron or 

 malachite, constitute the Tile- Ore, which was formerly considered as a 



