” MINERALS FROM NEW CALEDONIA. 229 
curved faces ; in the other specimens, also from the Balade mine, 
the crystals are smaller but better developed, consisting of groups 
of tetragonal pyramids combined with faces of the secondary prism 
and the basal pinacoid. 
Most of the specimens of chalcopyrites received from the 
Balade mine would be described by miners as peacock copper, on 
Associated with the copper pyrites are the minerals quartz, both 
resembling statuary marble in appearance ; it is very unusual for 
marble to appear under such circumstances ; calcite is however 
very commonly met with in mineral veins. Some of the frag- 
mately the same, and may all therefore be referred to the same 
system of fracture. Another series of joints—merely divisions In 
the rock—occur however, and these dip S. but are not repre 
Sented in the deposits. sag 
To give you an idea of the geological formation of the district, 
I have collected 34 specimens illustrative of the various. meta- 
morphic rocks which are met with in ascending the mountain In a 
N. or transverse direction for a distance of about 24 miles, é.e. from 
ts base near where the deposits of copper crop out at surface. 
