174 
INDEX. 
North Carolina— Continued. 
corundum in— Continued. Page. 
Marshall 11, H7, 126, 147 
McChristian place 147 
Mincey mine 104, 147 
Montvale 104, 148 
Newfound Gap 148 
Nona 148 
Owens Creek 148 
Presley mine 49, 148 
Reed mine 120, 148 
Retreat 49, 54, 148 
Sapphire 33, 35, 54, 05, 86, 88, 148 
Sapphire mine 148 
Scaly Mountain 122, 148 
Sheffield mine 57, 100, 1 19-120, 148 
Shoups Ford 148 
Socrates mine 124, 125, 148 
Statesville 12, 37-38, 145 
Swannanoa Gap 148 
Thumping Creek 51, 148 
Transylvania County 35, 53, 124-125 
Turkey Knob 52,148 
Watauga mine 120, 148 
Webster 59 
West Mills 149 
Whitewater mine 125, 149 
Yellow Mountain 123, 149 
Corundum Hill, big vein between peri- 
dotite and gneiss, plate show- 
ing 118 
corundum in chlorite at, plate 
showing 52 
dunite vein at, cross section of 32 
peridotite formation at, view of 117 
upper end of big cut at, plate show- 
ing 118 
Corundum Hill mine, corundum 
border vein at, cross section of. 30-31 
description of 117-119 
Cowee Valley, bed of ruby-red gravel 
at, plate showing ()0 
Cullakeenee mine. See Buck Creek 
mine. 
Cullasagee, corundum mill at, views 
of 160 
Cullasagee Creek, water of, utilization 
of 119 
emery in: 
Gaston County 61 
McChristian place 139, 147 
Mine Fork 140, 148 
Skeener Gap 139, 148 
Waldroop mine 148 
Winston-Salem 148 
Herbert mine, description of 121 
Isbell mine, description of 121-122 
Jackson County, mines in, description 
of 123-126 
Macon County, mines in, description 
of 117-120 
Madison County, mines in, description 
of 126-127 
Mincey mine, interior view, open cut 
on, plate showing 118 
Muskrat Fork, corundum in gneiss, 
plate showing 52 
North Carolina — Continued. Page, 
peridotite rocks and corundum locali- 
ties in, map showing 126 
Reed mine, description of 120 
ruby in: 
Cowee Creek Valley 98-99, 101 
Corundum Hill mine 98 
Cullasagee 98 
In Situ Hill 99, 100 
Ruby mine, plate showing 60 
Sapphire, peridotite areas near, map of. 124 
Sapphire mine, description of '. . . 125 
sapphires in 10.5-106, 147 
Sheffield mine, description of 119-120 
Watauga mine. See Reed mine. 
Webster, gneiss in peridotites at 29 
North Carolina Corundum Company, corun- 
dum deposits of, at Buck Creek, 
N. C, description and view of. . 121 
Norton Emery Wheel Company, corundimi 
made by, method of 75 
Optical properties of corundum 19-20 
Origin of corundum 71-97 
in peridotite, theory of 81-92 
Parting in corundum 16-18 
Pegmatite, corundum in 49-50 
Pennsylvania — 
corundum in: 
Blackhorse 149 
Chester County 50, 131 
Delaware County 50, 131 
Fremont 149 
Mineral Hill 149 
Shimerville 149 
Unionville 132, 149 
Villagegreen 149 
West Chester 149 
Peridotite associated with hornblende- 
gneiss, character of 29-30 
at Buck Creek, N. C, plate showing out- 
crop of 28 
corundum in 28-35 
origin of 76-92 
review of literature on 76-79 
theory of si -92 
cross section, showing mass after intru- 
sion into gneiss 83 
relations of corundum to 79-81 
Peridotite formation at Buck Creek, N. C, 
corundum in, plate showing 120 
at Corundum Hill, N. C, views of. . . 1, Ki, 117 
at Laurel Creek, Georgia, views of . . . 129, 130 
Peridotite-gneiss contact at Laurel Creek, 
Ga., plate showing 128 
Peridotite rocks and corundum in North 
Carolina and Georgia, map 
showing location of. 126 
Physical properties of corundum 15-20 
Pirsson, L. V., on corundum in amphibole- 
schist 58 
on corundum of Yolo (xulch, Mont... 46-47 
Pleochroism exhibited by corundum gems 19 
Plumasite, corundum in 42-44 
corundum in, origin of 94 
Porphyroids and corundum schists, occur- 
rence of 65 
Prospectors for corundum, suggestions to. 168-169 
