J. L. Smith—Emerald-green Spodumene. 129 
furnished by the rocks beneath. The soil has been formed by 
the decomposition of these rocks, and surface washings have 
caused only small displacement of the mineral from its original 
locality. The rocks are metamorphic and are mostly gneiss 
and mica schist. 
The vein bearing the spodumene crystals runs almost due 
east-and-west across the bedding, and dips at an angle of 70°. 
It is only a few inches wide and two feet in lateral exten- 
sion, being in fact a kind of chimney. There are other 
similar veins in the vicinity, but it is only in this one that the 
crystals have yet been found. The walls of this contracted 
vein contain crystals of quartz, mica, rutile, beryl and ortho- 
clase. e beryls are very fine, and may yet be found suffi- 
ciently colored to be valuable as gems. The vein does not 
come to the surface but commences about eight feet below it, 
urements cannot be made. Sometimes single crystals are 
terminated by the planes 2-2 only, but the planes 2, 2-2 and 
are common. The prisms 7-7, J and 7-2 are common and 
terminal planes are uniformly rough and uneven, so much so 
that no satisfactory determination of their symbols can be 
mace ; they often form an edge, as the continuation of the front 
prismatic edge and this is rounded over the whole top of the 
