Mineralogy and Geology of Nova Scotia. 253 
beautifully interspersed with, and studded over the crystals of 
analcime, which they are never known to penetrate, but from 
which they receive impressions as if deposited at a later period. 
Accompanying the analcime and needlestone of this place, a min- 
eral was met with in hexahedral prisms, which, agreeing in chem- 
ical and physical characters with no mineral described in the 
systems, will undoubtedly prove tobe some new substance. It is 
identical with no species of the genus kouphone-spar of Profes- 
sor Mohs, and the only minerals with which, from crystallographic 
characters, it can be supposed to be identical, are the colorless 
crystals of phosphate of lime from St. Gothard, and the sommite 
from Italy ; from both of which, however, it is proved, beyond 
a doubt, to be distinet, by its very ready fusibility, its inferior hard- 
ness, and its unsusceptibility of dissolving or undergoing altera- 
tion when its smaller fragments are thrown into nitric acid. On 
comparing it with the Davyne, a mineral more recently discovered 
by Messrs. Monticelli and Covelli of Naples, and described in 
their Prodromo della Mineralogia Vesuviana,* it appears to pos- 
sess many characters in common with that substance, having the 
same fundamental form, of which it presents the same modifica- 
tions, and observes nearly the same proportions between the 
height and breadth of the crystals, but especially resembles it 
in its color, transparency, specific gravity, and pyrognostic charac- 
ters. In its hardness, however, it is inferior to the crystals of that 
mineral, as it leaves no trace on glass, being softer than phosphate 
of lime, as we have before observed ; a character of some impor- 
tance, opposing as it does the identity of the two substances. It 
yields to cleavage very indistinctly, and only in a direction par- 
* Page 405. 
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