FIBUOLITE. 99 



dissolved in salt of phosphorus, but some particles remain 

 a long time unaltered. The pale greenish globule becomes 

 opake by flaming, or on cooling, when very much saturated. 

 Before the whole portion has been dissolved, it assumes a 

 pale rose colour in the reducing flame. It has been consi- 

 dered as an Yttro-tantalite, which is not contradicted by 

 the experiments before the blowpipe. It is described un- 

 der that denomination in the German original of the pre- 

 sent work. 



It is found imbedded in rhombohedral Quartz at Kiker- 

 taursak near Gape Farewell in Greenland. The specimens 

 to which the preceding description refers are in the cabinet 

 of Mr ALLAN, who proposed the name of Fergusonite. 



F1BROLITE. 



Fibrolite. JAM. Syst. Vol. III. p. 535. Man. p. 322. Fi- 

 brolite. PHILL. p. 80. 



Prismatic. P -}- oo = 100 (nearly). Cleavage 

 P -f- QD, imperfect. Fracture conchoidal. Mas- 

 sive : composition columnar. 



Colour white, grey, inclining to green. 



Harder than quartz, BOUENON. Sp. Gr. = 3-2 14, 

 BOURNON. 



It is infusible before the blowpipe. If rubbed it emits 

 a dark red phosphoric light. According to CHENEVIX, it 

 consists of 



Silica 38-00. 



Alumina 58-25. 



Oxide of Iron 0-75. 



It occurs in the Carnatic, and likewise in China, along 

 with rhombohedral Corundum. It was described by Count 

 BOURNON. 



