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faces reflect yellowish and reddish illinitions, probably from 

 the position and colour of the matrix. Its peculiar glance 

 is pretty well represented when we see the whitish shining 

 appearance of the print. The substance itself is chiefly 

 recognizable by this glare. On Charcoal with a blowpipe 

 it melts into a black enamel, difficultly when compact, but 

 more easily when in a looser and rather decomposed state, 

 when it is generally of a reddish hue. It has often been taken 

 for Hornblende : it looks very like some Feldspar in its 

 peculiar lustre; and I have seen Carbonate of Lime some- 

 what resembling it, in the coarser crystallized masses of 

 rocks. 



Mr. Hatchett is said to have first observed it in the Ser- 

 pentine of Cornwall ; and I have received specimens from 

 my kind friend Philip Rashleigh, Esq. ; and this month I 

 received a specimen gathered by Mr. Jackson in Montrose, 

 Scotland. 



