106 
NATURAL HISTORY. 
[long 
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 denomi¬ 
nated 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 sili¬ 
ceous calamine, the finest specimens of which are those 
from Siberia and Hungary; the variety called willemite , 
from Aix-la-Chapelie.— 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 idocrase in Tolle- 
marken, Norway.— Silicate of iron , to which belong the 
hisingerite , sideroschizolite, chlorophceiie , and stilpnomelane . 
■— Silicate of copper , or siliceous malachite, formerly called 
chrysocolla and copper green ; to which is also referred the 
dioptase or copper emerald, a scarce substance from the 
Kirguise country in Siberia.— Silicate of bismuth , also 
called bismuth-blende, a rare mineral substance in hair- 
brown globules from Schneeberg, Saxony.— Silicate of zir - 
conia , to which belong Werner's common zircon and some 
hyacinths, from Ceylon, Auvergne, Chili, the Lake Ilmen 
in Siberia; also the variety called zirconite from Fried- 
ricksvarn in Norway, &c.;—the blue zircon from Vesu- 
vius.— Silicate of alumina : to this belong the kyanile or 
disthene, and its varieties, the bucholzite and the siliimanite; 
and also the scarhroite , lialloysite , lenzinite , &c.; together 
with such varieties of clay as are chemical combinations of 
alumina and silica. 
For the subdivision into groups of the Silicates 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 ; 
