PHYSIOGRAPHY. CLASS II. 



Combinations. 1. P GO. 2 -^- 2 P 5. Sim. Fig. 92. 

 Zinnwald, Saxony. 



2. -JL- p _ 5. P. Sim. Fig. 105. Schlag- 

 genwald, Bohemia. 



3. P. P + 1. Zinnwald. 



4. P. {. ili^- 2 )!. P + 1. Carrock, 



Cumberland. 



5. P. P + 1. ( ^ Schlaggenwald. 



6 P LilLLz-J)!' P 4- 1 -1 ( p + *) 3 



12 r 2 



Fig. 108. Schlaggenwald. 



Cleavage. Pand P + 1. Generally more splend- 

 ent in the direction of the latter, though more 

 interrupted by small conchoidal fracture than the 

 other cleavage in the direction of P. Traces par- 

 allel to P oo. Fracture imperfect conchoidal, 

 uneven. Surface ; P GO commonly drusy 

 or rough ; P irregularly streaked parallel to the 

 edges of combination with ( p + *)% sometimes 



concave. The faces of the rest of the forms, 

 and particularly P + 1 generally smooth. 



Lustre vitreous, inclining to adamantine. Colour, 

 generally white, often inclining and passing into 

 yellowish-grey, yellowish- and reddish-brown, 

 sometimes almost orange-yellow. Streak white. 

 Semi-transparent. . .translucent. 



Brittle. Hardness = 4-0... 4-5. Sp. Gr. = 6-076, 

 a white cleavable variety from Schlaggenwald. 



