GALLERY.] 
NATURAL HISTORY. 
113 
where this substance occurs in primitive rocks ;—the jef- 
Jersonite ;—the granular variety called coccolite ;—the va¬ 
rieties of diopside , at first considered as a 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 deposited; the pyrgome 
orjassaite, and the aclmite. The metalloid diallage or 
diallagite, also called schiller-spar, from the Hartz, Salz¬ 
burg, &c., the bronzite and the hypersthene or paulite (La¬ 
brador hornblende of Werner), may likewise be referred 
to this tribe of minerals. 
Case 35. Among its contents may be specified the 
mineral substances which have been described under the 
appellations of thallite, arendalite, acanticone, delphinite, 
&c., which are Werner’s pistacite and are now more gene¬ 
rally designated by the name of epidote , given to them by 
Hally. To this also belongs the manganesiferous epidote , 
referred by some to the ores of manganese.— Gumming - 
ionite .— Zoisite .—Among the specimens of idocrase (vesu- 
vian of Werner), the more conspicuous are the large beau¬ 
tiful crystals (the unibinaire of Hally), discovered by 
Laxmann on the banks of the Vilui in Kamsehatka, em¬ 
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 resin, from Norway and North America; 
—the melaniie , found particularly in the neighbourhood 
of Frascati j—the grossular or Wilui garnet, a fine lights 
