5S NATURAL HISTORY. [NORTH 
the bronzite and the xanthophyllite _To the silicates of magnesia is 
likewise referred the olivine , which, in its purer state, is denpminated 
chrysolite or peridot , and when protoxide of iron is predominant, has, 
by some, been called hyalosiderite. 
Case 26. Silicate of zinc, called smithsonite (after the ingenious 
chemist w 7 ho first distinguished its nature,-and that of silicates in ge¬ 
neral), and 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 idocrase in Tellemarken, Norway.— Sili¬ 
cate of iron, to which belong the hisingerite, sideroschizolite, chlorophoeite , 
chloropal , stilpnomelane,gillingite, fayalite, and some other newly disco- 
covered mineral substances .—Silicate of copper, or siliceous malachite, 
also called chrysocolla and copper-green : to which may be referred 
the dioptase or copper-emerald, a scarce mineral from the Kirguise 
country in Siberia .—Silicate of bismuth , 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 Friedricks- 
varn in Norway, and the ostranite from the same locality;—the blue 
zircon from Vesuvius.—To these is added the thorite of Berzelius, 
from Brevig in Norway, a new mineral in which the metal thorium 
was first discovered.— Silicate of alumina: of these w r e have the 
hyanite or disthene, and the related mineral substances called sillimanite , 
bucholzite, and fibrolite, (one of the concomitant substances of the 
corundum of the Carnatic);—the halloysiie, lenzinite, scarbroite , bole, 
and some minerals or similar aspect are also referable to the silicates of 
alumina, and among these may be particularized the cailinite or Indian 
pipe-stone from the quarry of Coteau des Prairies, brought from thence 
by Mr. Catlin, the first white man allowed by the Indians to visit it, 
and after whom the substance was named by Dr. Jackson —agalmatolite 
(Werner’s bildstein, Haiiy’s tale glaphique) employed by the Chinese 
for carving images, vessels, &c. 
The Silicates with several bases are under arrangement in a series of 
Cases, nearly in the following order : 
Cases 27 and 28 contain the zeolitic substances: apophyllite, or 
ichthyophthalmite, in fine crystals, from Hesloe in Faroe ; with stilbite; 
with tessellite of Brewster, with poonalite of Brooke, &c.; a variety of 
apophyllite, called albine by some mineralogists ;—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. ;— anal - 
cime, among the crystallized varieties of which are remarkably large 
specimens of the trapezoidal and triepointe modifications from Fassa 
in Tyrol ;—stilbite and heulandite , or foliated zeolite in splendid speci¬ 
mens from Iceland, Faroe, and Scotland \—brewsterite;—laumontite or 
