gallery.] natural history. 165 
and that from Gopfersgriin in Bareuth, with small crystals 
of other mineral substances, especially quartz, converted 
into, and forming part of the massive steatite; variety 
called chalk of Brian^on;— keffekil , or meerschaum, from 
Natolia, of which the well-known pipe-bowls are made, and 
that from Valecas in Spain;—also a related substance, 
called keffekilUte by Dr. Fischer, who discovered it in the 
Crimea;— liihomarge, the more remarkable varieties of 
which are, that of a reddish yellow colour in porphyry from 
Bochlitz, and the fine purplish blue variety from Planitz, 
formerly called terra miraculosa Saxonica, &c.— serpentine , 
the purer varieties of which (generally hydrates) are called 
noble serpentine: they constitute, in combination with pri¬ 
mitive limestone, the verde antico and some other fine green 
marbles; of the varieties of the common serpentine, are best 
known 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 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-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 
i 
