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 
cipyre), but appears to be distinct from both. 
Cases 3,4. Among the many varieties of spinel 
we have the ceylonite or pleonaste, by some still 
considered as a distinct species, and the blue 
o 
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 chrysoberyl 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. 
