254 PHYSIOGRAPHY. 



Uranium-Ochre Variegated Copper. 



4. Beautiful varieties are found in Cornwall. It also occurs at Jo- 

 hanngeorgenstadt, Schneeberg, and Eubenstock; at St. Symphoriennear 

 Autun, and at St. Yrieix near Limoges in France. 



URANIUM-OCHRE. Uranium Lusine-Ore. 



Massive : composition impalpable; earthy and pulverulent. 



Color, sulphur-yellow, citron yellow, to brownish or red- 

 dish yellow. 



1. It affords moisture on being heated in a glass tube. It turns green 

 in the reduction flame of the blow-pipe, without melting. 



2. It is believed to be an oxide of uranium, though according to ZIPPED 

 the variety from Joachimsthal contains carbonic acid. 



3. It is found accompanying the Pitchblende in Cornwall and in Bo- 

 hemia. 



URANIUM-ORE. (See Pitchblende.) 

 URANIUM- VITRIOL. (See Johannite.) 



UWAROWITE. 



Crystals small rhombic dodecahedrons. 

 Lustre vitreous. 

 Color emerald-green. 



Hardness (scale of BREITHAUFT) = 10 and above. 

 1. Locality not mentioned. 



VALENCIANITE. (See Perildin.) 

 VANADIATE OF LEAD. (See PyromorpJiite.) 



VARIEGATED COPPER. Octahedral Bronze- 

 Pyrites. 



Primary form. Regular octahedron. 

 Secondary forms. 



1. Primary, having its angles truncated. 



2. Regular octahedron. Cornwall. 



3. Octahedron, with the angles truncated. Cornwall. 

 Cleavage, traces in the direction of the primary faces- 

 Fracture small conchoidal, uneven. Surface generally 



