NATURAL HISTORY. 
165 
GALLERY.] 
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 Briancon;— 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 keffekillite by Dr. Fischer, who discovered it in the 
Crimea;— lilhomarge , the more remarkable varieties of 
which are, that of a reddish yellow colour in porphyry from 
Rochlitz, 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 
hisingeriie, 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 
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