70 
natural history. (Minerals.) 
[north 
fayalite , anthosiderite, and some other newly discovered mineral 
substances .—Silicate of copper , or siliceous malachite, also called 
chrysocolla and copper-green -, to which may be referred the diop- 
tase or copper-emerald, a scarce mineral from the Kirguise country in 
Siberia .—Silicate of bismuth, also called bismuth-blende and eulytine , 
found in the form of hair-brown globules and indistinct crystals, 
at Schneeberg, Saxony .—Silicate of zirconia , to which belong Wer¬ 
ner’s zircon and some hyacinths of jewellers, from Ceylon, Auvergne, 
Chili, the Lake Ilmen in Siberia; also the blue zircon from Ve¬ 
suvius; the variety called zirconite from Friedricksvarn in Norway, 
the ostranite from the same locality, but which appears to differ 
from zircon only by its inferior hardness;—the malacon , or hydrous 
zircon. — To these is added the thorite of Berzelius, from Brevig 
in Norway, a mineral in which the metal thorium was first dis¬ 
covered.— Silicate of alumina: of these we have the andalusite; 
(with which is placed the chiastolite or hollow spar , hohlspath W., 
one of the several minerals called cross-stones: the structure of its 
crystals is but little understood), the kyanite or disthene, and the re¬ 
lated mineral substances called sillimanite; xanthite, worthite, bucholz- 
ite , and fibrolite (one of the concomitant substances of the corundum 
of the Carnatic);—the allophane , th e 'halloysite, lenzinite, scarbroite, 
collyrite , bole, and some minerals of similar aspect are also referred to 
the silicates of alumina. Among them may be particularized the 
catlinite 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, with which various steatitic 
substances have been confounded) 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 to 29 contain zeolitic substances: apophyllite , or ichihy - 
ophthalmite , 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 other modifications from Fassa and 
the Seiser Alpe in Tyrol ;—stilbite and heulandite , or foliated zeolite 
in splendid specimens from Iceland, Faroe, and Scotland ;-brewster- 
ite;—laumontite or lomonite also called efflorescent zeolite, because 
most of its varieties are subject to decomposition by exposure to the 
air;—a suite of specimens of comptonite from Vesuvius, lining the 
cavities of a pyroxenic lava, &c., accompanied by gismondine and other 
crystallized substances; together with thomsonite , which is supposed 
to be only a variety of comptonite ;—gmelinite or hydrolite; — levine, 
and several other scarce zeolitic substances. 
Case 29. To the same family of minerals belongs the prehnite , the 
grass-green variety of which, discovered in South Africa by the Abbe 
