336 
POPULAR SCIENCE REVIEW. 
tifully-formed reddisli crystals, having 1 a great resemblance to 
the diamond. These crystals are as hard as the diamond itself, 
and may, in course of tune, should their manufacture be 
brought to perfection, supersede that stone in many of its 
uses, such as cutting and polishing precious stones, forming 
jewels in watches, &c. ; and thus, althoug’h from their being 
unknown, in nature they cannot be considered precious stones, 
the discovery of these boron diamonds may prove of more 
practical value than all the attempts at the artificial production 
of the real diamond. 
