PHYSIOGRAPHY. 



Albite Allanite. 



dain, Con., in two different localities ; the one along with Chrysoberyl 

 and Columbite, where it is almost impalpably massive ; the other, one 

 mile and a half S.W., where it occurs in large granular individuals of a 

 greenish white color, associated with Quartz, black Tourmaline, and 

 rarely with the variety of mica called Finite. A variety similar to that 

 occurring along with the Columbite of Haddam, comes from Finbo and 

 Brodbo in Sweden. 



ALLAGITE. (See Red Manganese-Ore.} 

 ALLANITE. Te tar to-Prismatic Melane- 

 Ore. PARTSCH. 



Primary form. Right oblique-angled prism. M on T 

 = 115. 



Secondary form. 



Mon r - .... 116 00- 

 Ton r ------ 129 00 



s on r -.-.-- 135 30 



y on r ..... 109 01 



s on a? ----- 156 



t on x ----- 164 



y on a; - - - - - 151 



y on t 166 



45 

 30 

 00 

 30 



ivi 



Cleavage, parallel to r and M distinct. Fracture imper- 

 fectly conchoidal. 



Lustre imperfectly metallic to resinous. Color brown- 

 ish or greenish-black. Streak greenish-grey. Opake. 

 Faintly translucent and brown in thin splinters, to opake. 



Brittle. Hardness = 6-0. Sp. gr. 4-001. 



Compound varieties. In acicular aggregations. Mass- 

 ive. Composition impalpable. Lustre vitreous. Color 

 passing into brown if the mineral be decomposed. Sp. gr. 

 =.3-1. ..4*0. 



