166 
NATURAL HISTORY. 
[north 
hyacinths of jewellers, from Ceylon, Auvergne, Chili, the 
Lake Ilmen in Siberia; also the variety called zirconite 
from Friedricksvarn in Norway, &c.;—the blue zircon 
from Vesuvius. — Silicate of alumina: of these we have 
the kyanile or disthene, and its varieties, the bucholzite and 
the sillimanite , and also the scarbroite , halloysite , lenzinite, 
&c,;—together with such varieties of clay as are chemical 
combinations of alumina and silica. 
For the subdivision into groups of the Silicaies with 
several bases, the reader is referred to the tickets in the 
interior of the following ten Cases, which contain this ex¬ 
tensive class of mineral species. 
Case 27 contains the following zeolitic substances: 
apophyllite, or ichthyophthalmite, in fine crystals, from 
Hesloe in Faroe; with stilbite ; with tessellite of Brewster, 
with poonahlite of Brooke, &c.; a variety of apophyllite, 
formerly called albine, by Werner;— chabasite or chabasie, 
in groups of primitive rhomboidal and modified crystals ; 
—the variety called haidenite from Baltimore ;—mesotype 
from Auvergne, Faroe. &c., to which are also referred the 
natrolile of Klaproth, the needle-stone of Werner, the 
scolicite , the mesolite, krokalite, &c. ;— thomsonite ; — anal - 
cime, among the crystallized varieties of which are re¬ 
markably large specimens of the trapezoidal and triepointe 
modifications from Fassa in Tyrol. 
Case 28. Zeolitic substances continued; stilbite and 
heulandite ; — br ew sterile \—laumontite or lomonite, also 
called efflorescent zeolite, because some of its varieties are 
subject to decomposition by exposure to the air;— pfehnite, 
the grass-green variety of which, discovered in South 
Africa by the Abbe Rochon, has been mistaken for chryso¬ 
lite, chrysoprase, and even emerald;—to this also belongs 
the koupholite of Vauquelin. The substance known by 
the name of Chinese jade or you-stone, is likewise placed 
with prehnite, to which it has been referred by Count 
Bournon; but no chemical analysis has as yet been given 
of it.—A suite of specimens of comptonite from Vesuvius, 
lining the cavities of a pyroxenic lava, &c., accompanied 
by gismondine and other crystallized substances ;-gmeli- 
nite or hydrolite ;— levine, and some other new species of 
this extensive family of minerals. 
Case 29. To the same family belongs the harmotome 
