0. U. Shepard—Corundum of N. Carolina and Georgia. 177 
shadings, where the eraciplie! abounds. The small triangular 
Space between s and s refers to a cleavage face parallel with 
one of the primary planes. 
The sina 
le ues Very uneven, from being coated by a brown vermicu- 
lite, or altered ripidolite. Some of the lateral planes are coated 
™ patches with a white pearly margarite. The general color of 
3 tal is a grayish-blue, though there are spots, icularly 
near the angles, where it is of a pale sapphire tint. ts greatest 
AM. Jour, ate” as Serres, Vou. IV, No. 21.—SePTEMBER, 1872, 
