104 



STONE ART. 



quent rubbing. Figure 101 (chalcedony, from a mound iu Monroe 

 county, Tennessee) represents tlie type. The material is variable. 



D. Like the last, except much smaller. Very few are polished over 

 the entire surface; some are rubbed more or less on the edges or sides, 

 but a majority have the edge rough as it was chipped or pecked out; 

 many have either the edge or sides in the natural state. From those 

 smoothly polished to those very rudely worked the gradation is such 

 that no dividing line can be drawn. This is true, also, of the smaller 

 specimens of other types. Some of the quartzite specimens are very 

 loose in texture. From seven-eighths to 2 inches in diameter and one- 

 fourth to three-fourths of an inch thick. 



E. Convex on both sides, edges straight. One of white quartz from 

 Oaldwell county, North Carolina, has the sides much curved, making 



Fig. 102.— Discoidal stone, convex. 



the stone very thick in proportion to its width ; there is a deep pit on 

 each side, the entire surface being highly i)olished. Diameter, 2 to 3^ 



