CHARACTERS OF THE SPECIES. 



165 



Sp. Gravity. 



Various Observations. 



3-0...3-2. 

 6-05. 



2-2...2-5. 

 2-3. 



2-6.. .2-7. 



5-8. 



3-1...3-4. 

 4-2...4-4. 



Color pale yellow or pale green. 



Cleavage eminent. 



Long, slender, transparent crystals. 



Cleavage imperfect. 



