128 



TRANSACTIONS OF THE 



SIXTH ORDER— OPHITE. 



Mono-axis. No distinct cleavage in one direction only. 

 H. from 1, 4 to 4f. 



G. from 2, 45 to 2, 9. 



Unctuous to the touch ; some odor after being breath- 

 ed upon. 



When H. is less than 3, it is between 1 J and 



1§, and G. 2, 8. 

 G. 2, 4 : never hollo-rhombic, or the rhom- 

 bohedron entire.* 



Examples — Pinite, serpentine, pyrallo- 

 lite, picrosmine, osmalite, asbestus, 

 steatite, agalmatolite. 



SEVENTH ORDER— ZEOLITE. 



Pearl y, to vitreous lustre ; not opaline. 



H. from 4 to 8, 



G. from 2 to 2, 46. 



Tesseral, without dodecahedral cleavage, and 



G. 2, 2 and less. Example — Analcime. 

 G. from 2, 40 to 2, 46. Mono-axis, rhombic, 

 rhomboidal, and laterally cleavable. Exam- 

 ples — Heulandite, stilbite,f brewsterite, lau- 

 monite, monophane, apophillite, Thomsonite, 

 mesotype, zeagonite, Davine, Gmellinite, cha- 

 basite, and harmotome. 



# Although the title of this mineralogy is German, the characteristic is 

 nearly wholly Greek, for the sake of conspicuity. 



t H. Rose proposes now to call this desmine, and the first named mineral 

 stilbite, undoubtedly to assist the memory. 



