222 



PHYSIOGRAPHY. 



Garnet. 



4. The same as 1. with the addition of the truncation of 

 the acute solid angles of the dodecahedron by four planes 

 resting upon the edges of the dodecahedron, (uniternaire. 

 HAUY.) Bannat of Temeswar. 



5. Icositetrahedron. 



Fig. 211. 



6. Tetraconta-octahedron. 



Fig. 212. 



Mussa, Piedmont. 



Irregular forms and grains. 



Cleavage, parallel with the dodecahedron, but very indis- 

 tinct. Fracture conchoidal, more or less perfect, general- 

 ly uneven. Surface, the crystals sometimes streaked par- 

 allel to the edges of combination with the dodecahedron : 

 the dodecahedron itself is sometimes streaked parallel to 

 its edges of combination with the cube. The surface of 

 the grains is uneven, rarely granulated. 



