25 
as the stone set in a ring) is commonly called saloon. 
moon-stone ; modifications of crystals of this va- Nat . Hist. 
riety.—- Common feldspar , variously crystallized 
and massive, among the latter of which may be 
particularized the fine green variety from Siberia, 
called amazon-stone ; feldspar with imbedded 
fragments of quartz (graphic stone) from Siberia, 
&c.—To these are added a few specimens of dis¬ 
integrated feldspar, which passes into porcelain 
earth.—The chiastolite or made, placed in this 
table, is referred by Werner to feldspar, under 
the name of hollow spar. Petalite and spodumen 
or triphane, substances in which lithium, a new 
mineral alkali, has been discovered.— Indianite , 
one of the matrices of the common corundum of 
the Carnatic.— Albite .—As intermediate between 
the contents of this and those of the next case 
may be considered the leucile (amphigene of 
Haiiy), of which several varieties are here de¬ 
posited. 
(Case IS.) is principally appropriated to the 
substances of the garnet tribe. Among the more 
remarkable varieties of the noble garnet is that in 
curved-lamellar concretions, found massive in 
Greenland.—The pyrope , or Bohemian garnet, 
in rounded grains, &c.—The common garnet, the 
predominant colours of which are brown and 
green : among these may be mentioned the va¬ 
riety which, from its resemblance to resin, is 
called colophonite. To this also belongs the ele¬ 
gant 
