480 LIST OF MINERALS, THEIR 



I have seen are too much curved to admit of 

 a very precise measurement, 

 foliated ; Dialogite. 

 compact ; Rhodochrosite. 

 siliceous. 



anhydrous ; Allagite ; Photizite. 

 hydrous ; Rhodonite, 

 hydrate, 

 oxide. 



crystallised. A right rhombic prism, M on M' , 



100. 

 compact, 

 earthy. 

 Wad. 



fibrous, 

 frothy, 

 earthy, 

 silicate ; Red manganese ore. ..... 



foliated, 

 compact. 



Helvin, which see. 



Hydropite. 



, ferriferous, in octahedrons from Piedmont. 



hydrous. 



The precise differences between the preceding 

 varieties cannot be accurately stated, there being 

 no exact descriptions of the different minerals 

 analysed, except of the Helvin. 

 phosphate of Iron and Manganese, 

 sulphuret. 



Marble, see Lime, carbonate, compact. 

 Marekanite, see Obsidian. 

 Markasite, see Iron, sulphuret, arsenical. 

 Marl, see Lime, aluminous. 

 Mascagnin, see Ammonia, sulphate. 

 Meerschaum, see Magnesia, hydrate, siliceous. 

 METONITE. A right square prism^ mod. d. on a plane 

 belonging to class , 122. This species nearly corres- 

 ponds in measurement and chemical composition with 

 Scapolite. 



Melanite, see Garnet, black. 

 Melanteria, see Iron, sulphate. 



MELLILITE. A right square prism ; determined by W. P. . 

 from measurement of lateral primary, and secondary 

 planes. 



MELLITE ; Honeystone. An octahedron with a square base, 

 P on P', 93 7; P on P", 118" 31'. 



