gallery.] natural history. (Minerals.) 57 
occurs accompanied by other volcanic ejections, have, in Italy, obtained 
the name of Vesuvian gems, hyacinths, and chrysolites; the varieties 
called egerane , loboite; that from Tellemarken in Norway, coloured 
blue by oxide of copper ( cyprine ), and the rose-coloured variety, the 
thulite, from the same locality. 
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 uwarowite ;—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 Arendal, in Norway; the grossular or Wilui garnet, a 
fine light-green species from Kamschatka, so called from the fancied 
resemblance which its separate crystals bear to a gooseberry; the allo- 
chroite , also called splintery garnet, from Norway; the romanzovite; 
Haiiy’s 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 hya¬ 
cinths of commerce are cinnamon-stone). In this Case are also deposited 
—the gehlenite , from the Monzoni in Tyrol, to which species the melilite 
from Capo di Bove, near Rome, is now generally referred;—the cor- 
dierite , also known by the names of pelioma, iolite , and dichroite, 
massive and crystallized, from Cabo de Gata, from Greenland, Boden- 
mais in Bavaria, and Orayervi in Finland ( steinheilite );—the sordawa- 
lite from Finland;—the staurolite, called also grenatite and cross-stone, 
among the specimens of which may be specified the fine mackled 
crystals from Brittany, and the modifications of the simple crystals 
from St. Gothard, accompanied by prisms of disthene, perfectly simi¬ 
lar to those of the staurolite, and sometimes longitudinally grown 
together with them ;—the karpholite from Bohemia, &c. 
Case 37. One half of this Table Case is set apart for the silicates 
containing glucina and alumina, the principal species of which is the 
beryl, including the emerald, a gem which owes its beautiful green 
colour to oxide of chromium: the most remarkable specimens of 
emerald are those from Santa Fe, from the Ural, from Heubachthal 
in Bavaria, and from Mount Zahara in Egypt;—among those of the 
beryl or aquamarine, may be specified the fine blue and yellow varieties 
from Mursinsk in the Ural, the colourless limpid crystals, and those half 
blue and transparent, half white and opaque, from Odontchelong near 
Nerchinsk;—the bluish and greenish opaque beryls from Acworth in 
New Hampshire, where massy crystals have been found (the two 
imperfect prisms placed on the shelf near this Table Case weigh, 
the one 83, the other nearly 43 lbs.;—the euclase, a rare 
mineral, discovered by Dombey in Peru, but since only found as 
loose crystals, at Capao, near Villaricca, in Brazil, and in the chlo¬ 
rite slate of that territory;—the phenacite or phenakite of Norden- 
skiold (which as a bisilicate of glucine, might be referred to the 
silicates with one base in Table 26) occurs, together with emerald, in 
the Ural, and in brown iron stone at Framont in Alsace;—the helvine 
from Schwarzenberg, considered as a triple silicate of glucina, iron, 
and manganese.—Silicates containing yttria and protoxide of ce- 
