NATURAL HISTORY. 
167 
GALLERY.] 
Baireuth and from Zoblitz in Saxony, where they are manufactured into 
vases and various other articles; serpentine with embedded garnets, 
magnetic iron-stone, asbest, &c.—the marmolite of Hoboken in New 
Jersey likewise belongs to serpentine.—With these is also placed the 
olivine , which, in its purer state, is denominated chrysolite or peridot, 
and when protoxide of iron is predominant, has, by some, been called 
hyalosiderite . 
Case 26. Silicate of zinc , called also electric or siliceous calamine, 
the finest specimens of which are those from Siberia and Hungary; the 
variety called willemite, from Aix-la-Chapelle .—Silicate of manganese, 
of which there are several varieties (some of them only mechanical 
mixtures of this silicate, of carbonate of manganese, and quartz), which 
have received particular names, such as allagite, rhodonite, &c. Silicate 
of cerium or cerite , from Bastnas, Sweden,—with which is placed the 
rose-coloured substance called thulite, found with blue idocrasein Telle- 
marken, Norway .—Silicate of iron , to which belong the hisingerite , 
sideroschizolite, chlorophceite , stilpnomelane , and gillingite—Silicate of 
copper, or siliceous malachite, formerly called chrysocolla and copper- 
green : to which is also referred the dioptase or copper-emerald, a 
scarce mineral from the Kirguise country in Siberia .—Silicate of bis¬ 
muth , also called bismuth-blende, a mineral found in the form of hair- 
brown globules, from Schneeberg, Saxony .—Silicate of zirconia , to 
which belong Werner’s common zircon and some 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 
kyanite or disthene, and its varieties, the bucholzite and the sillimanite, 
and also the scarbroite, halloysite, lenzinite, &c. With these are also 
placed some of such varieties of clay as are chemical combinations of 
alumina and silica. 
For the subdivision into groups of the Silicates with severalbases, the 
reader is referred to the tickets in the interior of the following ten Cases, 
which contain this extensive class of mineral species. 
Case 27 contains the following zeolitic substances: apophyilite, or 
ichthyophthalmite, in fine crystals, from Hesloe in Faroe ; with stilbite; 
with tessellite of Brewster, with poonalite of Brooke, &c.; a variety of 
apophyilite, 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 natrolite of Klaproth, the needle-stone of 
Werner, the scolicite, the mesolite , krokalite, &c. ;—thomsonite ;-anal- 
cime, among the crystallized varieties of which are remarkably large 
specimens of the trapezoidal and triepointe modifications from Fassa 
in Tyrol. 
Case 28. Zeolitic substances continued; stilbite and heulandite ; — 
brewsterite;—laumontite or lomonite, also called efflorescent zeolite, be¬ 
cause most of its varieties are subject to decomposition by exposure to the 
air;— prehnite , the grass-green variety of which, discovered in South 
Africa by the Abbe Rochon,has been mistaken for chrysolite, chrysoprase, 
and even emerald;—to this also belongs the houpholiteoi 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 
