ORDER XII. FERITOMOUS RUBY-12LENDE. 45 



ehineal-red, the darker varieties inclining to lead- 

 grey. Streak scarlet-red. Semi-transparent ... 

 translucent on the edges. 



Sectiie. Hardness = 2-0 . . . 2-5. Sp. Gr . = 8-098, 

 the cleavage variety from Neumarktel. 



Compound Varieties. Twin-crystals: face of 

 composition parallel, axis of revolution perpendicu- 

 lar to a face of R oo ; the individuals frequent- 

 ly continued beyond the face of composition. Rare- 

 ly in some indistinct imitative shapes. Massive : 

 composition granular, of various sizes of individuals, 

 generally small, and often impalpable. In the last 

 case fracture becomes uneven, even, or flat con- 

 choidal. Plates, superficial coatings. There is 

 sometimes a tendency to thin columnar composition, 

 the mass being friable, and the colour scarlet-red. 



OBSERVATIONS; 



1. Cinnabar and Quicksilver Liver-Ore or Hepatic Cinna- 

 bar, which formerly used to be distinguished as two differ- 

 ent species, in fact do not differ more from each other than 

 calcareous spar and compact limestone, or crystallised and 

 compact hexahedral Lead-glance. The Quicksilver Liver- 

 Ore is a compound variety of Cinnabar, sometimes impure, 

 and having on that account a streak which is not perfectly 

 scarlet-red, but inclines to brown. There is a farther sub- 

 division of each of these two kinds of rhombohedral 

 Ruby-blende. The dark red Cinnabar comprehends the 

 crystals, and those compound varieties in which the indi- 

 viduals are still discernible ; it is generally cochineal-red. 

 The Irig7tt red Cinnabar is friable, and of a scarlet-red co- 

 lour. The compact Quicksilver Liver-Ore contains uni- 

 form massive varieties of a granular composition, consisting 

 of impalpable individuals. The slaty Quicksilver Liver- 



