206 PHYSIOGRAPHY. CLASS II. 



the Tyrol, where it is accompanied by rhombohedral Fluor- 

 haloide and axotomous Iron-ore. 



ORDER VI. SPAR. 



GENUS I. SCHILLER-SPAR. 



1. DIATOMOUS* SCHILLER-SPAR. 



Common Schiller-Spar. JAM. Syst. Vol. II. p. 117- Dia- 

 tomous Schiller-Spar. Man. p. 130. Schiller-Spar (in 

 part). PHILL. p. 71. Schillerstein. WERN. Hoffra. 

 H. B. II. 2. S. 264. Talkartiger Diallag. HAUSM. II. 

 S. 715. Schillerspath. LEONH. S. 518. Spath cha- 

 toyant. HAUY. Traite', T. IV. p. 395. Diallage me'tal- 

 loide (in part). Tabl. comp. p. 47. Traite', 2de d. T. II. 

 p. 455. 



Fundamental form. Scalene four-sided pyramid 

 of unknown dimensions. Simple forms, charac- 

 ter of combinations, &c. unknown, the latter pro- 

 bably hemi- or tetarto-prismatic. 



Cleavage in two directions, with different distinct- 

 ness, one of them being highly perfect and easily 

 obtained, while the other appears only in slight 

 traces. Inclination between 135 and 140. 

 Fracture uneven, splintery. 



Lustre, metallic-pearly and eminent upon the 

 perfect faces of cleavage, indistinctly vitreous 

 upon the other faces. Colour olive-green and 

 blackish-green, inclining to pinchbeck-brown upon 

 the perfect faces of cleavage. Streak greyish- 



* From ti through, and <ripvu I cut, easily cleavable in 

 one direction through the crystals. 



