118 PHYSIOGRAPHY. 



KNEBELITE. 



Knebelite of Lenz and Doebereiner. PHILL. p. 206. 

 Massive. Fracture imperfect conchoidal. 

 Lustre glistening. Colour grey, spotted dirty 



white, red, brown, and green. Opake. 

 Hard. Brittle. Difficultly frangible. Sp. Gr. = 



3-714, DOEBEREINER. 



It was found by DOEBEREINER to contain silica 32-5, 

 protoxide of iron 32-0, and protoxide of manganese 35'0. 



KUPFERINDIG. 

 Kupferinding. BREITHAUPT. Hoffm. H. B. IV. 2. S. 178. 



Implanted spheroidal shapes, with a crystalline sur- 

 face. Massive, plates : composition impalpable. 

 Fracture flat conchoidal, uneven. 



Lustre resinous, faint. Colour indigo-blue, inclin- 

 ing sometimes to blackish-blue. Higher resinous 

 lustre in the streak. Opake. 



Not particularly sectile. Intermediate between soft 

 and very soft. Sp. Gr. = 3-80 ... 3-82, BREITH. 



Before the blowpipe it burns before it becomes red-hot, 

 with a blue flame, and melts into a globule, which is 

 strongly agitated, and emits sparks. Finally it yields a 

 button of copper. It occurs at Sangerhausen in Thuringia, 

 the imitative crystalline varieties at Leogang in Salzburg. 



LATROBITE. 

 SPAR. 



Latrobite. BROOKE. Ann. of Phil. XXIX. p. 383. PHILL. 

 p. 380. CHILDREN. Ann. of Phil. XLIII. p. 38. 

 Diploite of Breithaupt. GMELIN. Edinb. Journ. of 

 Science. Vol. II. p. 287. 



