CORUNDUM IN UNITED STATES. 127 
mining done here, the depo,sit lias not l)een thoroughly prospected, 
and future deveh)pnients may sIioav the existence of a hirge deposit 
of corundum near the contact of the peridotite with the gneiss. 
There is no obvious reason Avhy this ore coukl not be used in the 
manufacture of any kind of an abrasive AvheeL Although the corun- 
dum can not be separated from the spinel, this should not interfere 
with its use for this purpose. 
Corundum was first found at this mine by Dr. C. D. Smith about 
1880, and soon afterwards Avork was begun by Mr. William Carter 
and Dr. H. S. Lucas, Avho took out a few tons in prospecting. After- 
wards a little ])rospecting was done by Mr. M. E. Carter, and by 
Messrs. Rice and Coleman, who sold the property to Tarr, Hamilton 
& Co., of New York, Avho began regular mining about ISSC). A 
steam crushing and cleaning plant Avas erected at the mine, and 
about 20 tons of corundum Avere cleaned and shipped from Marshall. 
Mining continued only about six months, and has not since been 
resumed. 
The corundum localities of North Carolina and Georgia are indi- 
cated on the map (PI. XV). 
GEORGIA. 
There are scattering deposits of peridotite extending across this 
State in a northeast direction, passing in a general Avay up the valley 
of the Chattahoochee River to the Avestern extremities of North and 
South Carolina. Along this line corundum has been found in the 
following counties: Rabiui, Towms, Union, Lumpkin, Habersham, 
Hall, Cobb, Paulding, Douglas, Carroll, Heard, Troup, and, some- 
what off the line to the east, in Walton, in Forsyth County surface 
specimens have been found that evidently originated in the quartz- 
schists of the region. Surface specimens of corundum that origi- 
nated in a mica-schist have been found in Upson County. Considera- 
ble Avork has been done along this belt in the nature of prospecting, 
and for a number of years n productive mine — the Laurel Creek — Avas 
operated at Pine Mountain, in Rabun County. 
The corundum localities are shown on the map (PL XV), which 
also gives the general location of the peridotite formations that have 
been observed in this section. Although there is considerable perido- 
tite occurring in the northern portion of the State, it is at but few 
places thus far that corundum has been found in any quantity, and 
these are at the extreme northern part, not far from the North 
Carolina line. 
Georgia corundum is well knowm, and perhaps has the best reputa- 
tion of any on account of that obtained from the Laurel Creek mine, 
AA'hich, with the exception of the Track Rock mine, is the only one 
that has produced any considerable quantity of corundum. The 
