318 APPENDIX. 



Silica 86-60 



Lime 6-25 



Alumina . . . . . . 2-23 



Water 4-00 



It is found in the fissures of iron-stone veins at Eybenstock in the 

 Erzgebirge. It was formerly confounded with Opal. 



ANALCIME. 



In large crystals in trap, at Keweena Point, Lake Superior. 



ANTHOPHYLLITE. (See Vol. I. p. 26.) 



Its angles are precisely the same as those of Hornblende, with which 

 species it is identical in ether properties. 



APATITE. 



This species is found in crystals above an inch in length, and smaller, 

 as well as massive, at Middletown, (Conn.), in granite. Its colors are 

 bluish green, greyish and pinkish white. It is associated with Colum- 

 bite, Uranite and Albile. 



ARFWEDSONITE. (See Vol. I. p. 38.) 



Analysis. 

 By THOMSON. 



Silica 50-50 



Peroxide of iron 35-14 



Deutoxide of manganese 892 



Alumina 249 



Lime 1-56 



Water . . . . Y 0-96 



ARRAGONITE. 



Very beautiful massive varieties of this mineral, abound at Ball's 

 Cave, Schoharie, (N.Y.) It forms stalactites and stalagmites of a snowy 

 whiteness. 



ARSENICAL SILVER. 



Mammillary, or consisting of very thin crystalline coats. Fracture un- 

 even. Color resembling Native Silver, but tarnished externally. Lus- 

 tre metallic, shining or glimmering. Sectile. Brittle. Streak shining 



