INDIANITE. 



113 



sive : composition lamellar, broad columnar, the 

 latter sometimes stellular. 



Cleavage, R oo perfect. 



Lustre pearly upon the perfect faces of cleavage. 

 Colour white, inclining to green. Streak white. 

 Translucent, sometimes only on the edges. Some 

 varieties lose their transparency on being ex- 

 posed to the open air. 



Sectile. Thin laminae flexible. Hardness = 1-0 ... 

 1-5. Sp. Gr. = 2-350, the variety from Unst. 



Before the blowpipe it loses in transparency and weight, 

 and becomes friable. In acids it is dissolved without ef- 

 fervescence, and consists, according to Drs BRUCE and 

 FYFE, of 



Magnesia 70-00 69-75. 



Water 30-00 30-25. 



It occurs at Hoboken in New Jersey, in small veins in 

 serpentine ; also at Swinaness in Unst, one of the Shetland 

 isles, under similar circumstances. In the latter place it 

 is frequently associated with a white variety of rhombohe- 

 dral Lime-haloide. 



INDIANITE. 



8PAH. 



Indianite. BOURNON. Phil. Trans. Y. 1802. II. p, 233. 

 Indianite. PHILL. p. 44. 



Grains. Cleavage in two directions, forming an 



angle of 95 15', BROOKE. 

 Colour greenish-white. Translucent. 

 Scratches glass. Sp. Gr. = 8-74, BOURNON. 



VOL. III. H 



