370 NATURAL HISTORY. [NORTIi 
bedded in a steatitic rock ; those from Vesuvius,, where 
this substance occurs accompanied by other volcanic ejec¬ 
tions, 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 cy - 
prine ;—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 vesu¬ 
vian: most ofthe hyacinthsof commerceare cinnamon-stone. 
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 established are:— 
the pyrope or chrome garnet, generally called Bohemian 
garnet, which occurs in rounded grains, and also embed¬ 
ded in serpentine, &c. ;—the colophonite, so called from 
its resemblance to rosin, from Norway and North America ; 
—the melanite , found particularly in the neighbourhood 
of Frascati;—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 goose¬ 
berry ;—the allochroite, also called splintery garnet, from 
Drammen in Norway;—the romanzovite . In this Case 
are also deposited—the gehlenite , from the Aionzoni in 
Tyrol, to which species the melilite from Capo di Bove, 
near Rome, is referred by some mineralogists ;—the iolite 
or pelioma , now generally called dickroite (from 4ts exhi¬ 
biting two different colours when viewed in different posi¬ 
tions), massive and crystallized, from Capo di Gate, from 
Greenland, Bodenmais in Bavaria, and Orayervi in Fin¬ 
land (steinheilite) ;—the sordawalite from Finland;—the 
karpholite from Bohemia, &c. 
Case 37. This Case contains the following substances : 
— staurolite , a bisilicate of alumina and of oxide of iron, 
called also granatite and cross-stone, among the specimens 
of which are 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.—Silicates containing yttria and 
protoxide of cerium ; viz. the gadolinite , from Ytterby 
