4j02 Mr. Tennant on the Composition of Emery. 
if seen in the direction in which the fiat surfaces present 
themselves to the eye. As these substances have no chemical 
relation to the emery itself, it is remarkable that they should 
also accompany the diamond spar from China ; for Mr. Klap- 
roth observes, “ that its lateral facets are mostly coated with a 
“ firmly-adhering crust of micaceous scales, of a silvery lustre 
he also mentions, besides felspar, pyrites, and grains of mag- 
netic iron ore. 
