Bob Wise mine

Mica Mine in Mitchell county, North Carolina, this site also known as Hawk Ruby

Bob Wise (Hawk Ruby) mine

Principal periods worked 1900, 1932, WWII, 1955-56.
Workings Cut 125, several adits, shaft 27, prospect pits.
Description of muscovite Ruby, hard, clear, mineral inclusions
Production Moderate sheet
Shape Lens, pods
Size 1-20 T
Strike NE
Dip NW., SE
Plunge SW
Relation to wallrock Partly concordant
Wallrock Interlayered hornblende and biotite gneiss
Extent of weathering Weathered
Remarks Pl-P-Q-M-B pegmatite, medium grained; accessory garnet.
Source of information USGS, DMEA

Geographic context


Principal periods worked
WWI World War I
WWII World War II
int intermittent
Small < 500 lb
Moderate 500-10,000 lb
Large > 10,000 lb
Size of pegmatite
D depth
L length
T thickness
avg average
Internal structure
B biotite
F feldspar
M muscovite
P perthite
Pl plagioclase
Q quartz
Source information
CMC Colonial Mica Corporation
DMEA Defense Minerals Exploration Administration
OME Office of Minerals Exploration
USGS U.S. Geological Survey
OF USGS open-file reports and maps