30 
SALOON. 
Nat. Hist. 
of mica or glimmer, may be specified those that ex¬ 
hibit perfectly transparent crystals; the beautiful 
red and yellow varieties, together with those of a 
metallic lustre: diverging-radiated mica, &c.— 
Pmite (micarelle of Kirwan).— Lepidolite\ with 
which is placed a specimen of what is considered 
as compact lepidolite.—Intermediate between mica 
and talc, is the chlorite, £fmong the varieties of 
which are the earthy, common, foliated, and the 
slaty: the last of these, with octohedral magnetic 
ironstone, bitterspar, &c.—Of talc we have the 
common or Venetian, which enters the composi¬ 
tion of cosmetics,' and the indurated talc: to the 
former of these may also be referred the beautiful 
green variety from Siberia,* composed of distinct 
groups of small diverging-radiated laminae.— Pot- 
stone or ollite, the lapis comensis of the ancients, 
from Como in the Milanese, where it is turned on 
the lathe into most durable culinary vessels.—In 
this case is also placed a substance from New York, 
which has very much the appearance of white lami¬ 
nar talc, but is a hydrate of magnesia, 
(Case 18.) contains steatitic substances.—Ao- 
hle serpentme, which, in combination with primi¬ 
tive limestone, constitutes XhQ marmo verde antico; 
common serpentine, among the varieties of which 
are best known those from Bareuth and from Zdh- 
litz in Saxony, where they are manufactured into 
vases and various other articles; serpentine with 
garnets. 
