21 
Case 9 . In this case are deposited (besides 
the specimens of rock crystals continued from 
the opposite compartment of the table-case) the 
different varieties or subspecies of jasper such as 
they are enumerated by Werner, mz, the globu¬ 
lar or Egyptian jasper^ found chiefly near Cairo, 
in rounded pieces, which appear not to owe 
their form to rolling, but to be original and 
produced by infiltration; the ribbon jasper, or 
striped jasper, the finest varieties of which are 
found in Siberia ; the variously-tinted common 
jasper; the agate jasper, found only in agate 
veins ; the porcelain jasper, which is produced 
by the action of subterraneous fire on clay slate. 
Also the substances constituting the obsidian 
tribe, such as the pitch-stone, which is often 
confounded with semi-opal;—the pearl-stone, so 
called from its colour and the small globular 
concretions of which it is composed ;—the ob¬ 
sidian, a remarkable variety of which is that 
found in globular pieces, at Ochotzk in Siberia, 
near the small river Marekanka, from which it 
has obtained the name of marehanite ; pumice^ 
which is not in all cases of volcanic origin. 
Near these substances are placed some speci¬ 
mens of the mineral called iolite or pelioma, as 
also dichroite, from its exhibiting tvv^o different 
colours when viewed in different positions; to 
this belongs the substance from Orayervi in 
Finland, called steinJiellite. 
SALOON. 
Nat. Hist. 
Case 
