SYNONYMES, AND PRIMARY FORMS. 469 



Gregorite, see Titanium, oxide, ferriferous. 



Grossularia, see Garnet. 



Gummistein, see Quartz, Hyalite. 



Gurhofian, see Lime, carbonate, magnesian, compact. 



Gypsum, see Lime, sulphate. 



H 



Hallite, see Alumine, sub-sulphate. 

 Hallotricum, see Magnesia, sulphate. 



HAHMOTOME; Andreasbergolite ; Andreolite ; Ercinite. 

 A right rectangular prism. M on a plane belonging to 

 class 6, 150. 



HAUYNE ; Latialite. A rhombic dodecahedron. Another 

 blue mineral from Vesuvius has been also called Haiiyne, 

 but it appears to be of a different species, to which, for 

 the purpose of placing it in this alphabetical series, I 

 have given the name of Napolite. 



HAYDENITE. 



HEDENBERGITE. Is said to have cleavages parallel to the 

 planes of an obtuse rhomboid similar to that of carbon- 

 ate of lime, of which it contains only about 5 parts in 

 100. If this be really so, it will afford an instance of 

 the near approach of two rhomboids, belonging to dif- 

 ferent species oi minerals, and will offer another exam- 

 ple of the influence of a small portion of carbonate of 

 lime to determine the form of the mass. 



Heliotrope, see Quartz, calcedony. 



Helviu ; see Manganese, silicate. 



Dr. Wollaston has kindly supplied me with the che- 

 mical character of this substance, and has thus enabled 

 me to place it in its proper station in the list. 



Hematite, brown, see Iron, oxide, hydrous. 



red, , anhydrous. 



Hepatite, see Barytes. 



HEULANDITE ; foliated Stilbite. A right oblique-angled 

 prism-, MonT, 130 30'. 



Highgate resin, see Bitumen. 



HISINGERIT. 



Hogauite, see Mesotype. 



HOLMITE. 



Honey-stone, see Mellite. 



Hornblende, see Amphibole. 



ferriferous, from Greenland, see Arfwedsonite. 



Hornstone, fusible, see Felspar, compact, 

 infusible, see Quartz. 



Humboldite, see Lime, borate, siliceous. 



