COLLECTION OF MINERALS. 297 



ment paid to the learned professor of geology in 

 this Museum, to whom we owe the first exact 

 description of this substance. 



The Euclase, which we see in the same case, 

 was brought from America by Dombey, travel- 

 ling naturalist to the Museum. This mineral, 

 which is only remarkable for its rarity, is of an 

 agreeable green colour, and can easily be po- 

 lished; but, for the great facility with which 

 it splits, it is never worked into objects for 

 ornament. 



The garnet, which is distinguished by the size 

 and exactness of its dodecahedral crystals, affords 

 several precious stones ; such as, the Syrian garnet, 

 which is red mixed with violet ; the Bohemian 

 garnet, of a vinous red mixed with orange; and 

 the vermeille, which is of a deep scarlet. 



We will pass rapidly over the different sub- 

 stances which terminate the second class (twenty- 

 fifth case) ; because they are mostly unknown to 

 those not acquainted with the science, and are 

 scarcely of any use in the arts. 



The felspar, which we see in the twenty-sixth 

 case, however, deserves attention for the beau- 

 tiful varieties which it affords ; amongst which 

 is the Labrador stone, or opaline felspar, whose 

 iridescent reflections may be compared to the 

 wings of the most beautiful butterflies; the 



