60 
NATURAL HISTORY. 
[north 
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 
modifications of the simple crystals from St. Gothard, accompanied by 
prisms of disthene, perfectly similar 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 
bend, 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 im¬ 
perfect prisms placed on the shelf near this Table Case weigh, the one 
eighty-three, the other nearly forty-three pounds);—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, if really a bisilicate of glucine, should be referred to the 
silicates with one base in Table 26) occurs, together wfith emerald in 
the Ural, and in brown iron-stone at Framont in Alsace;—the helvine 
from Schw 7 arzenberg, considered as a triple silieate of glucina, iron 
and manganese _ Silicates containing yttria and protoxide of cerium; 
to these belong the gadolinite , the allanite or cerine , the orthite and 
pyrorthite, as likewise the tshefkmite of Rose *. The rest of this Table 
Case is occupied by the oxide of titanium and the titanates, to the former 
of which belong — the rutile, also called titan-shorl, massive and crystal¬ 
lized, the reticulated variety, generally with golden tarnish, from Mou- 
iier, near the Mont Blanc ;— the capillary rutile in rock crystal from Bra¬ 
zil, in beryl from the East Indies, &c.;—the anatase (oisanite or octa- 
hedrite), which occurs only crystallized, chiefly at Bourg d’Oisans, in 
Dauphiny. Among the titanates the more remarkable are—the silico- 
titanate of lime, called sphene or titanite , and, among these, the varieties 
formerly designated by the name of brown and yellow 7 menakanite, in 
large crystals, from Arendal in Norway; the variety from St. Gothard, 
calledravonnante en gouttiereby Saussure, on feldsparwith chlorite,&c.; 
_the pyrochlore , a titanate of lime, w 7 ith titanate of protoxide of uranium, 
&c., from Fredricsvarn in Norway;—the polymignite , found in the zir¬ 
con -syenite of the same locality, and composed chiefly of the titanates of 
zirconia and yttria; also the aeschynite from the lake Ilmen near Miask, 
beino- a titanate of zirconia and oxide of cerium;—the oerstedtite, a tita¬ 
nate of zirconia with lime, magnesia and protoxide of iron, from Aren¬ 
dal ;_the mosandrite , from the same locality, being a silico-titanate of 
* These are removed to the next Table Case. 
