PHYSIOGRAPHY. 295 



Kupaphrite. 



Cleavage, parallel with P perfect. Fracture not observ- 

 able. Surface, M deeply streaked in a horizontal direc- 

 tion. The rest of the faces smooth. 



Lustre pearly upon P, both as faces of crystallization, and 

 of cleavage ; vitreous upon the other faces* Color pale 

 apple-green and verdigris-green, inclining to sky-blue. 

 Streak of the same color, only paler. Translucent, gene- 

 rally only on the edges. 



Very sectile. Thin laminae, flexible. Hardness =1-0 

 1-5. Sp. gr. = 3-098, of a crystallized variety from 

 Schwatz. 



Compound Varieties. Reniform and botryoidal shapes : 

 surface drusy, composition columnar, faces of composition 

 a little rough. 



1. Alone, before the blow-pipe, it decrepitates very briskly, and 

 throws around powdered fragments, which color the flame green. In 

 the process, it immediately turns black, and melts into a steel-grey pearl, 

 destitute of crystalline facets. On charcoal, it quietly emits moisture, 

 without detonation ; but after a longer exposure to the influence of the 

 flame, it swells a little through the extrication of arsenical vapor. With 

 carbonate of soda, an imperfectly fluid mass is obtained, which contains 

 a nucleus of white metallic matter. 



2. Analysis. 



By KOBELL,. 



From Falkenstein in the Tyrol. 



Arsenic acid , - 25-366 . . . 25-01 

 Oxide of copper . . 43-660 . . . 43-88 



Water . 19 824 17 ' 46 



Carbonate of lime . 11-150 . . 13-65 



3. It occurs in beds and veins, accompanied by other ores of copper, 

 particularly by Blue Malachite. 



4. The known localities of Kupaphrite are, the Bannat of Temeswar, 

 Libethen iu Hungary, Schwatz in the Tyrol, Saalfeld in Thuringia, and 

 Matlock in Derbyshire. 



