24 
saloon, it exhibits) are several from the transition syenite 
Nat. Hist, of Laurwig in Norway.—The adularia (which 
stands in the same relation to common feldspar, 
as rock crystal to common quartz) is principally 
found on Mount St. Gothard,but not in the valley 
of Adula, from which its name is improperly de¬ 
rived :■—this variety when cut en cabochon (such 
as the stone set in a ring) is commonly called 
moon-stone; modifications of crystals of this va¬ 
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 frag¬ 
ments of quartz (graphic stone) from Siberia, &c. 
—To these are added a few specimens of disinte¬ 
grated 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.— Icespar.—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 leucite (amphigene of 
Haiiy), of which several varieties are here de¬ 
posited. 
Case 13, 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. 
