OHDKR VI. GENERA AND SPECIES. 429 



H. = 5-5 ... 6-0. 

 G. = 2-9 ... 3-0. 



Azurestone or Lapis Lazuli. J. ii. 288. 



2. PRISMATIC. Prismatic. 



Cleavage, P + oo = 91 30*, imperfect 

 Colour bright. 

 Streak uncoloured. 

 H. = 5-0 ... 5-5. 

 G. = 3-0 ... 3-1. 



LazuKte. ii. 290. 



3. PRISMATOIDAL. Prismatic. 



Cleavage, prismatoidal, imperfect. 

 Colour pale. 

 Streak uncoloured. 

 H. = 5-5 ... 6-0. 

 G. = 3-0 ... 3-1. 



Prismatoidal Azure-Spar or Blue-Spar. J. ii. 292. 



Amblygonite. iii. 70. 



Bergmannite. iii. 77. 



Bucklandite $ iii. 83. 



Calaite. iii. 83. 



Chiastolite. iii. 84. 



Diaspore. iii. 92. 



Eudlalyte. iii. gg. 



Gehlenite. iii. 102. 



Hauyne. . iiL 107. 



Karpholite? iii. H6. 



Nephrite. iii. 131. 



Saussurite. iii. 143. 



Sillimanite. iii. 153. 



Somervillite. Hi. 154. 



iii. 162. 



