15 
the latter (as feldspath apyre), but is distinct saloon. 
from both. Na~Hist» 
(Case 3.) Among the specimens of chryso- 
beryl or cymophane may be noticed the North 
American variety, in its matrix of quartz and 
feldspar, with small trapezoidal garnets. — Kyanite 
or disthene, massive, in separate crystals, and 
imbedded, with grenatite, &c. : also in small 
polished pieces which are sometimes mistaken 
for sapphires. — A series of crystals of Brasilia!!, 
Saxon and Siberian topazes, among which 
there are some new modifications ; Saxon va- 
rieties, imbedded in the topaz rock, an ag- 
gregate of topaz, shorl, quartz and sometimes 
mica, — Emerald and beryl : several insulated 
crystals of the true ' emerald from Peru : very 
perfect prismatic crystals in their matrix. Beryls 
of various colours, the most common of which 
js the variety called .aquamarine: the fine 
groups of these, found in a ferruginous loam 
at Nerchinsk and Odontchelong in Siberia, are 
very remarkable ; beryl (or perhaps pycnite) from 
Limoges in France, and from Rabenstein at 
Twiesel in Bavaria. — Near the beryl, (though 
perhaps not very nearly related to it,) is placed 
the euclase, a rare crystallized mineral substance 
discovered, by Dombey, in Peru, 
The 
