82 PHYSIOGRAPHY. 



but well defined crystals on a reniform variety of the hemi- 

 prigmatic Habroneme-malachite, which itself covers octa- 

 hedral Copper-ore, in the Bank mine at Ekatherineburgh, 

 Siberia. 



BROOKITE. 

 ORE. 



Brookite. LEVY. Ann, of Phil. Febr. 1825. 



Prismatic. P = 135 46', 101 37, 94 44'. Vol. I. 

 Fig. 9. LEVY. 



a : b : c = 1 : V 3-237 : A/ M49. 

 Simple forms. P oo (p) ; P (e*) ; (?r I) 5 



(&*) = 126 31', 135 41', 72 O 7 ; (Pr + oo) 3 

 (m) = 100 (X ; (| 2) 3 (i) = 124 1 1', 149 



37, 65 0' ; f Pr (e*) = 77 36' ; Pr + 1 (e*) 

 = 56 24' ; Pr + oo (#') ; Pr 1 (a 2 ) =: 148 

 56' ; f r (a f ) = 124 52' ; Pr + a> (^'). 



Char, of Comb. Prismatic. 



Combination. 1, ?r 1. f r. (| f 2)*. 

 (Pr I) 3 . | Pr. P. (Pr + oo) 3 . ?r + oo. 

 Pr+oo. Snowdon, Fig. 190. 



Lustre metallic adamantine. Colour hair-brown, 

 passing into a dee.p orange-yellow, and some red- 

 dish tints. Streak yellowish- white. Translu- 

 cent . . . opake, the brighter colours are observed 

 by transmitted light. 



Brittle. Hardness = 5-5 ... 6-0. 



It contains titanium, but has not yet been analysed. The 

 first varieties were noticed by Mr SORET among the mi- 

 nerals accompanying pyramidal Titanium-ore from Daib. 



