15 
(bournonite of Lucas), one of the concomitant 
substances of common corundum; and the emery 
which owes its hardness and consequent useful¬ 
ness in polishing to an admixture of blue corun¬ 
dum. Between the common corundum of this 
and the feldspar of the contiguous opposite table- 
case, is placed the andalusite, which was first 
considered as a congener of the former, and 
afterwards referred to the latter (as feldspath 
apyre')^ but appears to be distinct from both. 
Cases 3,4. Among the many varieties oispinel 
we have the ceylonite or pleonaste, by some still 
considered as a distinct species, and the blue 
spinel from Aker in Siidermania. Another sub¬ 
stance nearly related to this species, is the auto^ 
molite from Fahlun in Sweden, being the spi- 
nelle zincifere of Haiiy.—Among the specimens 
of chrysoheryl or cymophane may be noticed 
the North American variety, in its matrix of 
quartz and feldspar with small trapezoidal gar¬ 
nets.— Kyanite or disthene, massive, in separate 
crystals and imbedded, with grenatite, &c. : also 
in small polished pieces, which are sometimes 
mistaken for sapphires.—Emerald and beryl: 
several crystals of the South American emerald^ 
insulated and in their matrix; emeralds from 
Salzburg. Beryls of various colours, the most 
common of which is the variety called aqua¬ 
marine : the fine groups of these, found in ferru¬ 
ginous loam at Nerchinsk and Adontchelong 
in^ Siberia, are very remarkable; large crystals 
of 
SALOON. 
Nat. Hist. 
