13 
SALOON. 
Nat. Hist. 
some varieties of the cat's-eye (mostly from Cey¬ 
lon); a substance generally referred to the 
natural order of quartz. 
Case 6 . Besides some specimens of substances 
related to common quartz, such as the avanturino 
quartz , the flexible sandstone from Brasil, and the 
ironflint (a substance in which oxide of iron exists 
in chemical union with silica), this case contains 
varieties of the stalagmitical quartz , also called 
quartz sinter. The most remarkable among these 
are the siliceous concretions deposited by the ce¬ 
lebrated hot spring in Iceland, the Geyser, one 
variety of which is called siliceous iifl the other 
calcedonic sinter . An other variety of it is th e pearl 
sinter from Santa Fiora in Tuscany (whence it 
has obtained the name of Fiorite), and from the 
island of Ischia. To this may also be referred 
the ceraunian cinter , or those enigmatical silice¬ 
ous tubes which were first found in the sands of 
the Senner heath, in the county of Lippe (where, 
from their supposed origin, they are called light¬ 
ning tubes), and subsequently, under similar cir¬ 
cumstances, at Drigg, on the coast of Cumber¬ 
land, which is the locality of the specimen here 
deposited. [See also British Coll.]—The hyalite 
is placed here, as a mineral related both to sta¬ 
lagmitical quartz and calcedony.-The restof this 
table-case and the greater part of the following 
are occupied by calcedonic substances. Among 
the specimens of common calcedony , the most re¬ 
markable are, the smalt-blue variety from Felso- 
banya 
