62 
CORUNDUM IN THE UNITED STATES. 
[bum. 180. 
very similar to the corundum found at the Whitewater mine, 6 miles 
soutli of the Sapphire mine. The Socrates mine is about three- 
quarters of a mile southwest of the Sapphire, in a bold outcrop of 
peridotite. The corundum is in small, knotty nodules and is easily 
cleaned. A contact vein was encountered, but little work was done 
to develop it. 
The Bad Creek mine lias been worked more than any other in this 
section, and is located about three-quarters of a mile nearly soutli of 
Sapphire. The work done at this mine has been almost entirely on a 
LiftleHogbac 
Pig. 11. 
-Map of the peridotite areas in the vicinity of Sapphire, Jackson County, N. C, showing 
the location of the different corundum mines. 
contact vein which has been exposed for the distance of 130 feet and 
lias been worked at one point to a depth of 60 feel. The corundum 
ore that was encountered in this vein is of two distinct kinds; in one 
the corundum is associated with garnet and hornblende, and in the 
other, which is free from garnet, the corundum is in a matrix of biotite- 
mica. These two ores should always be kept separate, for the corun- 
dum can readily be cleaned and separated from the associated minerals 
in the biotite ore and will yield a product that can be used in the 
manufacture of the vitrified wheel; but the corundum can be sepa- 
rated only with difficulty from the ore that contains the garnet. Unless 
