Foreign Notices in Mineralogy, &. a 
common in the calcedonies of other localities ; and it is 
covered with a thin layer of green earth. 
I have one very beautiful specimen of jasper, composed 
of alternate layers of red, brown, white, and grass green. 
mong some specimens, which the captain of the vessel 
told me he picked up “ on the summitof a lofty mountain,” 
I observed three or four small pieces of selenite 
and arsenical iron pyrites were also fade in these 
islands. } . : 
The specimens of crystallized quartz brought here, were 
numerous, and many of them of great beauty. . 
ese minerals, as I was informed, were picked 
up “ loose on ve ahi of the islands,” but many v were ob- 
hiloso 1 Fora. 
ms « Rock Bye centile 8 nine ne globule? of water formed 
and forming, in decaying granite in Elba-—The granite of 
Elba is sometimes traversed by fissures, and these fissures 
are frequently filled with a chews aiping Meta granite, in which, 
we are told, are ay ing rock-crystals, nearly all of 
wees contain bubbles of water ; and sometimes there ap- 
peare'e-vegetble-like mint 
ce Oe fe the. . at ¢ " 3 
Vargas Bedowars ‘who has rmbt nt a yen ee 
the geognostic structure of the Faroe islands, 
strontites, in secondary trap; also opal, most ost fre 
precious 
Rey MS 
disc 
‘the 
a bt ral he cog oF sep al; 
jotrope, | ii black 
and he mentions having found crattwnge u 
flint also in the trap-r rocks.” 
“ Mohs’s characteristic “An Bnglh csc ty O~ 
fessor Mohs oni yi of his characteristic, or bic te TS 
the Or Bei ands of mit 
ier published at Edinburgh. Pied — ae is bu 
freee pores a slots’ ——s 
