TAB. COXVE. 
CUPRUM nativum. 
Native Copper, Leaf-lke. 
Class 3. Metals. Order 1. Homogeneous. 
Gen. 10, Cuprum. Spec. 1. Nativum. 
Div. 2. Imitative. 
‘Tas curious specimen of Copper nearly in a pure state, 
and commonly called Native Copper, comes from Huelvor 
near Redruth in Cornwall. It is an excellent example of 
the manner jn which the Copper was held in solution, and 
the solvent subsiding from it, leaving it in a state to explain 
the nature of the’ particles cohering, while supported by a 
sort of reciprocal gravity in the solvent, which allowed it 
to expand almost in distinct nuclei, by masses in the form 
of leaves, resembling vegetation, teaching us a beautiful 
lesson to explain the changes and formation of mineral 
substances*. I do not know that the rhomb, perhaps pri- 
mitive rhomb, of Copper has been before noticed ; it seems 
in this instance to form into the octaédron ;—see the left 
* Mineral substances approach vegetation more perhaps. than has gene- 
rally been suspected, and may throw a light on that subject which has 
hitherto been -a desideratum, or very obscurely understood. The pre- 
sent specimen resembles the Fucus Hypoglossum, or ruscifolius, in the leaflets 
coming from the middle of the larger foliage. 
