5S 
NATURAL HISTORT. 
[north 
the name of krokydaiite has been given; (in many eases asbest and 
amianth are only modifications of the state of aggregation of several 
mineral species, such as hornblende, &c., to which Breithaupt also re¬ 
fers the metaxite, the kymantine, the peponite and pycnotrope. ) The 
remainder of this Case contains pyroxenic mineral? :— augiie , in separate 
crystals, and embedded in lava from Vesuvius, together with groups of 
well-defined crystals from Arendahl in Norway, where this substance oc¬ 
curs in primitive rocks;—th ejeffersonite ; —the granular variety called coc- 
colite: —the varieties of diop side, at first considered as a distinct species, 
including the mussite and alalite from Piedmont •—the sahlite or mala- 
colite, to which also belongs the baikalite, of which a few fine specimens 
are here deposited ; 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 Hally. To this also belongs the manganesiferous 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 Laxmann on the banks of the Vilui in Kamsehatka. 
embedded in a steatitic rock; those from Vesuvius, where this substance 
occurs accompanied by other volcanic ejections, have, in Italy, obtained 
'he name of Vesuvian gems, hyacinths, and chrysolites; the varieties 
called egerane, Joboiie, 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 
lime-garnets, comprising chiefly the melanite from the vicinity of Frascati, 
and some brownish-black varieties, the colophonite , so called from its re¬ 
semblance to rosin, from Norway and North America ; 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 albchroite, also called splintery garnet, from Norway ; the 
romanzovite; the essonite ( kessonite ) 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 commerce are cinnamon-stone. In this Case are also 
deposited—the geklenite, from the Monzoni in Tyrol, to which species 
the melilite from Capo di Bove, near Rome, is referred by some mi¬ 
neralogists ;—the ioUte or pelioma, now generally called 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 sordaica- 
Ute from Finland;—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 
