PHYSIOGRAPHY. CLASS n. 



Quartz and brachytypous Parachrose-baryte. It occurs 

 near Werfen in Salzburg, in the valleys called Schlamming 

 and Radelgraben. Whether or not the Lazuhte from 

 Waldbach in the district of Vorau in Stiria, and from the 

 Rathhausberg in Salzburg, belong to the present species, is 

 yet to be ascertained. 



3. PRISMATOIDAL AZURE-SPAR. 



Prismatoidal Azure-spar or Blue Spar. JAM. Syst. Vol. I. 

 p. 306. Man. p. 180. Blue Felspar. PHILL. p. 115. 

 Blauspath. WERN. Hoffm. H. B. II. 1. S. 287. Split- 

 triger Lazulith. HAUSM. II. S. 373. Lazulith (in 

 part). LEONH. S. 415. Feld-Spath bleu. HAUY. Trait^, 

 T. II. p. 605. Tabl. comp. p. 60. Traite', 2de Ed. T. 

 IV. p. 490. 



Fundamental form. Scalene four-sided pyramid. 

 Vol. I. Fig. 9. Simple forms and combinations 

 unknown. 



Cleavage, indistinct, sometimes pretty easily ob- 

 served in only one direction. Also traces in 

 other directions making oblique angles with the 

 former. Fracture uneven. 



Lustre vitreous, slightly inclining to pearly upon 

 faces of cleavage. Colour smalt-blue, inclining 

 sometimes to white or green. Streak white. 

 Translucent on the edges, often nearly opake. 



Brittle. Hardness = 55 ... 6-0. Sp. Gr. = 3-024, 

 the Stirian variety. 



Compound Varieties. Massive: composition 

 granular, often in large individuals ; strongly co- 

 herent. Fracture often splintery. 



1. So little is known of the geometrical properties of the 



