APPENDIX. 
97 
renders fracture very difficult to obtain. Some masses, however, are tabu- 
lar in their structure and striated, but the striae are not at right angles 
but cross each other obliquely, giving, when cleavage is obtained, rhom- 
boidal faces and angles similar to that of common Feldspar. Cleavage in 
some specimens is eminently perfect. The prevailing color of the Co- 
rundum at this locality is gray and blueish gray, with much less of the 
regular Sapphire, than at Corundum Hill. This Corundum is very hard, 
and usually gives extremely sharp cutting angles. It is a superior stone 
for use in the arts. 
The pink and ruby colored Corundum found at this locality is distinct 
from that described. It occurs in a different matrix, and so far as my 
observation extends, is wholly unconnected with the gray colored variety. 
"While this is the case here, the red variety at Corundum Hill is inti- 
mately connected with the gray and blue varieties. Generally, the ruby 
color penetrates a gray stone from a quarter to half an inch from its sur- 
face, and then gradually disappears. At the Buck creek locality the color 
is solid through the whole stone, and I have hope, when the Spring opens 
to find Valuable specimens of it. 
I have not discovered any cubic or octohedral minerals at this locality. 
The law of crystalization prevailing here seems to be the rhomboidal, 
and I repeat, what I have already said, that there is probably a change 
going on in the Corundum at this locality and pseudomorphism may pre- 
vail here. This is, at least, an open question for scientific investigation 
Were I in a position to make a close, practical and systematic investi- 
gation of the entire Chrysolite zone, there are strong probabilities that 
other and valuable discoveries might be made in this rare and interesting 
mineral. I know of its existence for a distance of one hundred and 
twenty or thirty miles along the zone, but having passed over the line of 
out-crops hastily, and not being able at my own expense to investigate 
the respective localities, I am unable to say whether it occurs in quantity 
at any other localities than the two I have discussed in this paper. Such 
examination as I have suggested would perhaps develope gems of Ruby 
and Sapphire, and Diaspore, another rare and interesting mineral. 
I have given a brief outline of the immediate geology along this zone 
of Chrysolite dikes and a statement of the principal minerals that occur 
on the Corundum bearing out-crops. I have described as near as practica- 
ble the mode of the Corundum’s occurence and ako the minerals imme- 
diately associated with it. I have stated the facts plainly, avoiding 
technicalities as much as possible, for the benefit of the general reader, 
and I hope that I have, in this paper, contributed something to the char- 
acter of the grand old North State for mineral wealth. 
C. D. SMITH. 
