20 
SALOON. 
Nat. Hist. 
lightning tubes), and subsequently, under similar 
circumstances, at Drigg, on the coast of Cumber¬ 
land, which is the locality of the specimen here 
deposited.—The hyalite is placed here, as a mine¬ 
ral related both to stalagmitica! quartz and calce¬ 
dony.—The rest of this glass case and the greater 
part of the following, is occupied by calcedonic 
substances. Among the specimens of common 
calcedony , the most remarkable are the smalt-blue 
variety from Felsobanya in Transylvania, crystal¬ 
lized in cubes ; the branched and stalactical calce¬ 
dony from Iceland, &c.; the botryoidal from Fer- 
roe ; nodules including water (enhydrites) from 
Monte Berico, near Vicenza, where they are said 
to occur in volcanic rocks; cut and polished 
pieces of calcedony, with black and red dendritic 
and other figures, vulgarly called mocha stones ; 
varieties with white, brown, and black, straight 
or curved lines : onyx, sardonyx, &c. 
(Case 7-) Calcedonic substances continued : 
among these are various specimens of the red and 
yellowish varieties of calcedony, called carnelian : 
striped carnelians, &c.— Heliotrope , an intimate 
mixture of calcedony and green earth, which, 
when containing disseminated particles of red 
jasper, is commonly termed blood-stone. — The 
beautiful and much esteemed variety of calce¬ 
dony, called chrysoprase: it has hitherto been 
only found at Kosemutz in Silesia, accompanied 
by a siliceous earthy substance, called pimelite , 
which. 
