110 



splintery > very little translucent at the edges. It is rather 

 tougher but scarcely harder than flint. It occurs in 

 many varieties, and is often marked with darker and lighter 

 stripes, but seldom very bright. Dull green is perhaps 

 most frequent. The present figure exhibits a very distinct 

 neatly striped vein in part of a variegated rock composed of 

 Quartz, &c, and there are small threads in little veins 

 passing irregularly from it. It was picked up on the coast 

 of Airshire, and is in the possession of my friend Mr. Laing 

 of Edinburgh. 



I have pieces of large masses of Jaspfir striped or co- 

 loured nearly in the same way, from the shores of Scotland. 

 Jasper was formerly much used for large trinkets, &c, as 

 it takes a good polish. 



