30 
hand figure. The other figure exhibits the two sides of the 
plates chiefly formed of rhombs, showing as it were the 
under view. We could not measure these with any cer- 
tainty, as they are very much interrupted and irregular. 
We, however, think it very interesting. The octaédron, 
—see the left hand figure—and the rhombs in its direction 
seem to agree with the Native Coppers, and partly modify 
hexangular plates as they partly do in these specimens, and 
into consequently into double hexaédral pyramids ;—see. 
Vol. 1 tab. 25. | 
I have the pleasure to say that I possess a small sample 
of this very curious Copper Ore, by the favour of my kind 
friend Philip Rashleigh, Esq., marked by him from 
Treskerby, Cornwall. 
