112 CU. Shepard—Corundum of N. Carolina and Georgia. 
ertheless attended by quite a different series of minerals. The 
outcrop extends over three hundred acres. Arfvedsonite, zoi- 
site, albite and margarite are here found as its most frequent 
attendants. The corundum is either white or gray like com- 
mon feldspar, or else a delicate and often deep ruby-red color. 
No tourmaline or spinel have thus far been noticed, though 
oceasional detached specimens of picrolite in long and rather 
does it emit, on being moistened, the peculiar odor of serpen- 
tine. Where a partial decomposition has taken place, we only 
see a thin crust or coating of a ferrugingus powder on the sur- 
face. Nothing soft or taley appears, or any change indicating 
a metamorphosis to serpentine. Though usually quite homo- 
characters: Color yellowish olive-green ; structure fine granu- 
ar to compact; luster glimmering, vitreous. H.=5%5 to 6°. 
Gr.=3-04 to 3°06. When heated to redness in powder, it turns 
pale cinnamon-red. Infusible. Easily AS by hydrochlo- 
ric acid, with which it forms a stiff semi-transparent jelly. 
Composition : 
99°80 
with traces of the oxides of chrome and nickel. The forego- 
ing characters obviously place this abundant mineral under the 
species villarsi = 
The mineral next in importance is the green chloritic one 
already mentioned as the immediate gangue of the corundum. 
