70 
natural history. (Minerals.) 
[north 
been proposed; and which, if the analysis given of it be correct, is re¬ 
ferable to the silicates of iron. The remainder of this Case and part of 
the next contain pyroxenic minerals:— augite, in separate crystals, and 
embedded in lava from Vesuvius, together with groups of well-defined 
crystals from Arendal in Norway, where this substance occurs in primi¬ 
tive rocks;—the jeffersonite ;—the granular variety called coccolite ;— 
the hypersthene and paulite {Labrador hornblende of Werner);—the 
lievrite , also called ilvaite and yenite , in particularly perfect crystals, 
chiefly from Elba: the wehrlite is a variety of this species;—the va¬ 
rieties of diopside, at first considered as distinct species, including the 
mussite and alalite from Piedmont;—the sahlite or malacolite, to which 
also belongs the baikalite, of which a few fine specimens are here de¬ 
posited ; the pyrgome or fassaite, and the achmite. 
Case 35. Among its contents may be particularized the mineral sub¬ 
stances which have been described under the appellations of thallite, 
arendalite, acanticone, delphinite, &c. ; most of these are Werner’s pis- 
tacite and are now more generally designated by the name of epidote, 
given to them by Haiiy. To this also belongs the maJiganesiferous epi¬ 
dote, considered by some as an ore of manganese.— Cummingtonite .— 
Zoisite _Among the specimens of idocrase (vesuvian of Werner), the 
more conspicuous are the large beautiful crystals (the unibinaire of 
Haiiy), discovered by Laxmannon the banks of the Viluiin Kamschatka, 
embedded in a steatitic rock ; those from Vesuvius, where this substance 
occurs accompanied by other volcanic ejections, have, in Italy, obtained 
the name of Vesuvian gems, hyacinths, and chrysolites; the varieties 
called egerane, loboite ; and that from Tellemarken in Norway, coloured 
blue by oxide of copper, and known by the name of cyprine. 
Case 36. The greater part of this Case is appropriated to the various 
species and varieties of the garnet tribe, formerly divided into noble and 
common garnets. Among the more distinct chemical species now esta¬ 
blished are:—the chrome-garnets, to which belongs the pyrope ;—the 
beautiful chrome and lime-garnet, called uvarovite ;—the lime-garnets, 
comprising chiefly the melanite from the vicinity of Frascati, and some 
brownish-black varieties, the colophonite , bearing a distant resemblance 
to rosin, from Norway and North America; the grossular or Wiiui gar¬ 
net, a fine light-green species from Kamschatka, so called from the fan¬ 
cied resemblance which its separate crystals bear to a gooseberry; the 
allochroite, also called splintery garnet, from Norway; the romanzovite; 
the essonite ( hessonite ) or cinnamon-stone, chiefly from Ceylon, which 
was supposed to contain zirconia, till a more accurate analysis proved it 
to be nearly allied to vesuvian and garnet: most of the hyacinths of com¬ 
merce are cinnamon-stone. In this Case are also deposited—the gehlen- 
ite, from the Monzoni in Tyrol, to which species the melilite from Capo 
di Bove, near Rome, is referred by some mineralogists;—the cordi- 
ente , also known bv the names of pelioma , iolite , and dichroite, (from 
its exhibiting two different colours when viewed in different positions,) 
massive and crystallized, from Capo di Gate, from Greenland, Boden- 
mais in Bavaria, and Orayervi in Finland ( steinheilite) ;—the sordawa- 
lite from Finland;—the staurolite, a bisilicate of alumina and of oxide 
of iron, called also grenatite and cross-stone, among the specimens of 
which may be specified the fine macled crystals from Brittany, and the 
