Sts DESCRIPTIONS OF MINERALS. 
Pholerite, Hailoysite, Smectite, Severite, Glagerite, Lenzinite, Bole, Li- 
thomurge, are names of clay-like minerals. 
Pinite. 
pian naa and usually cryptocrystalline; but often 
having the form of the crystals of other miner ‘als from the 
alteration of which it has been made. Colors grayish, green- 
ish, brownish, and sometimes reddish. Lustre feeble; waxy. 
‘Translucent to opaque. Acts like a gum on polarized heht, 
and thus indicates the absence of true a ystallization, even 
when under the forms of crystals. H.=2°5-3. G.=2-6-2°85. 
Composition. Mostly (H;K_).A1, 0. Si. The pinite of Saxony 
afforded Silica 46°83, alumina 27° 65, 1ron sesquioxide 8°71, 
magnesia 1:02, lime 0°49, soda-0°40, “potash 6°52, water 3°83 
=I) 42 ; SPamdsein another analysis, potash 10°74. The phy- 
sical characters ally it to serpentine, and also nearly the 
atomic ratio, and it may be viewed as a potash-alumina ser- 
pentine. But at the same time it has very nearly the com- 
position of a hydrous potash mica, or damourite (sec next 
page). 
Obs. The varieties are pseudomorphs after different min- 
erals, and hence comes a part of their variations in compo- 
sition. They include Pinite, from the Pini Mine, near 
Schneeberg and elsewhere ; Gieseckite, pseudomorph after 
nephelite from Greenland, and from Diana, N. Y.; Dysyn- 
tribite, from Diana, identical with gieseckite ; Prnitoid, 
from Sayony; Wilsonite, from Bathurst, Canada, having 
the cleavage of scapolite ; Zerenite, from Antwerp, N. Y., 
hke Wilsonite ; Agalmatolite, or Pagodite, from China, be- 
ing one of the materials for carving into images, ornaments, 
models of pagodas, cte.; gigantolite and iberite, which have 
the form of iolite. 
Polyargite, Rosite, Cataspilite, Biharite are related materials. 
Putagonite. Yellow to brownish yellow, garnet-red to black in 
color, and resinous to vitreous in lustre. The material of some tufas, 
and the result of change through the agency of steam or hot water at 
the time, probably, of the deposition of the material. From tufas of 
Iceland, Germany, Italy, Sicily, and named from Palagonia, in Sicily. 
HYDROMICA GROUP. 
The following species are mica-like in cleavage and aspect, 
but tale-like in wanting elasticity, greasy fecl, and pearly 
lustre. They are sometimes brittle. Common mica, muse 

