PHYSIOGRAPHY. 293 



Kerolite. 







(Md.) and at Amity, (N. Y.) The pseudomorphoses occur at Middle- 

 field, (Mass.) in the shape of Quartz, of considerable dimensions, and of 

 greyish white color; and at Amity, (N. Y.) of a bluish green and dark 

 green color, in the shapes of Hornblende and Spinel. 



APPENDIX TO KEROLITE. 

 i. Dermatin. BREITHAUPT. 



Reniform, rarely globular, and in thin coatings or crusts. Frac- 

 ture conchoidal. 



Lustre resinous, slightly increased in the streak. Color black- 

 ish-green to leek-green, dark olive-green, and dark liver-brown. 

 Translucent on the edges. Streak straw-yellow, or pea-yellow. 

 Hardness = 2-0. Sp. gr. = 2-136. 



1. It has a greasy feel, and when moistened by the breath, emits an 

 earthy smell. Before the blow-pipe, it cracks, changes to a black color, 

 and increases in hardness. 



2. It is found upon serpentine, at Waldheim in Saxony. 



KILLINITE. (See Spodumene.) 

 KNEBELITE. 



Massive. Fracture imperfectly conchoidal. 

 Lustre glistening, to dull. Color grey, spotted dirty white, red, 

 brown and green. Opake. 



Hard. Difficult to break. Sp. gr. = 3-714. 

 1. Alone, before the blow-pipe, it remains unaltered. 

 2. Analysis. 



By DOEBEREINER. 



Silica . . 32-5 . . . 30-32 



Protoxide of iron . . 32-0 . . . 34-58 



Protoxide of manganese 35-0 . . , 36-10 

 Locality unknown. 



KoNIGITEt 



Primary form. Right rhombic prism. M on M' = 105. 

 Crystals elongated, somewhat barrel-shaped, and closely aggre- 

 gated. 



Cleavage parallel with P, perfect. 



Color emerald and blackish-green. Translucent. 



Hardness = about 2-0. 



25* 



