FLUELLITE. 101 



fuse, but its colour changes to brown ; with borax and salt 

 of phosphorus it gives a red or orange coloured globule, 

 which becomes pale on cooling. It occurs at Finbo and 

 Broddbo near Fahlun, imbedded in Albite, rhombohedral 

 Quartz, Sec. 



ii. Fluate with excess of base. 



Traces of crystalline structure. Colour yellow. 



It resembles porcelain jasper. It contains twice as much 

 of the oxides of cerium as the preceding substance. It also 

 comports itself much like it before the blowpipe. If heated 

 alone on charcoal, its colour turns black at an incipient red- 

 ness, but it assumes, on cooling, successively dark brown, 

 red, and orange tints. It is found at Finbo. 



iii. Fluate of Cerium. 



Not described. 



It has not been analysed, but presents nearly the same 

 characters before the blowpipe as the preceding substance, 

 except that in the matrass it does not give off so much 

 water, and that its colour turns brown. 



iv. Fluate of Yttria and Cerium. 



Earthy, found in masses seldom exceeding the size 

 of a pea. Colour pale red, sometimes deep red, 

 yellow, or white. Easily scratched by the nail. 



According to BERZELJLUS, it is a mechanical mixture of 

 fluate of y ttria with fluate of cerium and silica. It gives 

 nearly the same reactions as the Neutral Fluate i. 



FLUELLITE. 



IIALOIDE ? 



Fluellite of Wollaston. LEVY. Ann. of PhiL Oct. 1824. 

 p. 241. 



Prismatic. P = 109, 82, 144. Vol. I. Fig. 9. 

 Transverse section = 105 (nearly). WOLLASTON. 



