CHARACTERS OF THE SPECIES. 



155 



CUBE. 



Sp. Gravity. 



Various Observations. 



5-5. 



2-25. 

 2-9. ..3-0. 

 7-19. 



7-4.. .7-6. 



8-4. ..8-9. 



10-0.. .10-5. 



2-0.. .2-2. 



3-8.. .4-1. 



6-1. ..6-35. 

 2-4.. .2-5. 



4-9...5-05. 



Cleavage imperfect. 



Cleavage eminent. 

 Color red. 



The trapezohedron is the only occurring 

 form. 





