SYNONYMES, AND PRIMARY FORMS. 495 



crystallized. A regular octahedron. 

 granular, 

 amorphous. 



siliceo-calcareous ; Semel'me ; Sphenc ; Spinthere ; 

 Spinelline An oblique rhombic prism ; 

 M on M', 76 2'; P on M, 93 1', accord- 

 ing to the measurements of Rose, 

 chrichtonite; An acute rhomboid', Pon P'Gr.SO'. 

 TOPAZ; Physolite; Pycnite ; Pyrophysalite. A right 

 rhombic prism ; M on M', 124 23'. 

 yellow of Bournon, from Vesuvius, see Pyroxene. 

 Topazolite, see Garnet, yellow. 

 Torberite, see Uranium, phosphate. 

 Touch-stone, see Quartz. 

 TOURMALINE ; Electric schorl. An obtuse rhomboid', Pon P'. 



133 20'. 



black from the Hartz ; Aphrizite. 

 blue ; Indicolite. 

 red to purple, and sometimes colourless ; Apyrite , 



Daurite ; Rubellite ; Siberite. 

 dark brown acicular crystals are termed Cockle by the 



Cornish miners. 



acicular crystals from the Pyrenees ; Picotite. 

 Travertine, see Lime, carbonate, sedimentary. 

 Tremolite, see Amphibole. 

 TRIBLLASITE ; Fahlunite. 



crystallised. A regular hexagonal prism. 

 amorphous* 



Is probably the same substance as Gieseckitc. 

 Triphane, see Spodumene. 

 Tripoli, see Quartz, earthy. 



Tungsten, see Lime, scheelate. Both the tnetal, and the 

 ore in which it is combined with Lime, have been called 

 Tungsten, which tends to confuse the description of one 

 or the other of those substances. As an oxide has been 

 lately discovered, I have preferred adopting the term 

 Scheelium for the metal. 

 Turkey-stone, see Novaculite. 

 Turquoise, see Alumine, hydrate. 



TUUNERITE ; Pictite. An oblique rhombic prism ; P on M or 

 M', 99 40' ; M on M', 96 10'. See Annals of Phi- 

 losophy, April 1823. 

 Tyrolite ? see Azurite. 



