176 
NATURAL HISTORY. 
j_NORTH 
marbles; among the varieties of the common serpentine,, the 
best known are those from Baireuth and from Zoblitz in 
Saxony, where they are manufactured into vases and various 
other articles; serpentine with imbedded garnets, magnetic 
iron-stone, asbest, &c.— the marmoliie 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-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 idocrase in Telle- 
marken, Norway. — Silicate of iron , to which belong the 
hisingerite, sideroschizolite, chlorophceite , stilpnomelane , and 
gillingite .— Silicate of copper , or siliceous malachite, for¬ 
merly 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 bismuth, 
also called bismuth-blende, a mineral presenting hair- 
brown globules, from Schneeberg, Saxony.— Silicate of zir- 
conia , 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 ky anile 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 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: 
