144 



scalloped , partly concave and generally rather flattish, with 

 two sides broader than the rest j see the right hand magni- 

 fied figure at the bottom. 



I have placed another peculiar ramification at the bottom 

 on the left hand, showing more of the nature of structure 

 depending on the order of the crystallization, more or less 

 zigzag or feathered, which is shown more distinctly in the 

 magnified figure. The whole are very small, but indicate 

 the rhomb, tab. 216, and the dodecaedron, tab. 25, which 

 are almost recognisable : the rhombic accumulation is 

 pretty evident, and the angles of the zigzag appearance are 

 the corners of the rhombs. Moss Copper generally belongs 

 to this variety. 



The specimens are from Cornwall, but the upper one is 

 the most rare : such are much valued. 



