86 CORUNDUM IN THE UNITED STATES. [bull. 180. 
Sapphire. — The mines in the vicinity of this town are described on 
page 61. 
Sapphire mine. — The corundum occurs in peridotite. (See p. 61.) 
Scaly Mountain. — The corundum occurs in quartz-schist. (See 
p. 60.) 
Sheffield mine. — The corundum at this mine is in amphibole-schist. 
(See p. 58.) 
Skeener Gap. — Emery is found here in a basic magnesian rock. (See 
p. 72.) 
Slumps Ford. — At this place, in Burke County, corundum has 
been found associated with fibrolite. 
Socrates mine. — One of the mines in the vicinity of Sapphire. 
Corundum occurs in peridotite. (See p. 62.) 
Swannanoa Gap. — Float corundum has been found near an out- 
crop of peridotite. 
Thumping Creek. — Corundum has been found in rough nodules 
and flat crystals in gneiss on the property of Curtis Ledford and C. C. 
Patterson, on this creek, Macon County. 
Turkey Knob. — On the summit of this mountain, near the Macon- 
Jackson county line, corundum has been found sparingly in gneiss. 
Waldroop mine. — Emery has been found in a basic magnesian rock. 
(Seep. 72.) 
Watagua mine. — Same as the Reed mine. 
West Mills. — Red and ruby corundum have been found in the old 
gravel beds of the streams on the West farm, near West Mills, Macon 
County. 
Whitewater mine. — The corundum is in peridotite. (See p. 63.) 
Winston Salem. — Near this place, in Forsyth County, emery has 
been found similar to that at the McChristian place. 
Yellow Mountain. — The gneisses of this section carry a small per- 
centage of corundum. (See p. 60.) 
PENNSYLVANIA. 
Blackhorse. — Slender grayish crystals of corundum have been found 
at this place, which is near Media, Delaware County. This has been 
found inclosed by feldspar. 
Fremont. — Near this place, in West Nottingham Township, Chester 
County, corundum crystals have been found, surrounded by feldspar. 
Mineral Hill. — Corundum crystals have been found at this place, 
which is near Media, in Middletown Township, Delaware County, 
which were surrounded by feldspar similar to that at Blackhorse. 
Newlin. — See under Unionville. 
Shimerville. — At this place, in Lehigh County, corundum crystals 
up to 8 inches in length and 4} inches in diameter have been found 
loose in the soil. 
Unionville. — In a large mass of serpentine rocks, 1 mile northeast 
of this village, corundum lias been found. (See p. 66.) 
