ZS. Dana—Spodumene from North Carolina. 179 
ArT. XXX.—On the Emerald-green Spodumene fom psc 
County, North Carolina; by Epwarp S. 
THE composition and method of occurrence of the sole 
emerald-green spodumene from Alexander County, North 
lina, was described by Dr. J. Lawrence Smith in a recent num- 
ber of this Journal ;* —the variety was called by him hiddenite 
after Mr. W. E. Hidden. Dr. Smith’s article included a few 
notes by the writer in regard to the crystalline form of the 
mineral. The material available for study at that time was 
scanty and not suited for any accurate determinations of the 
in my hands a considerable number of crystals, some of them 
showing the terminations with tolerable distinctness. 
The crystals have uniformly a prismatic form, and vary 
from half an inch to two or three inches in length. They are 
usually very slender, though sometimes attaining a thickness 
one-third to one-half an inch in the direction of the clino- 
se axis; in the other transverse direction they are much 
thinner. The crystals show a considerable variety in habit as 
will be inferred from the annexed figures.t Figures 1 and 2 
represent the same form but the position of the axes is chang 
in fig. 1 the clinodiagonal axis @ is, as usual, inclined to the 
front, while in fig. 2 and in the other figures this axis is in- 
clined to the left side, and the orthodiagonal axis b projects to 
the front. i following figures, 5, 6, 7, 8, 9, are from sketches 
by Mr. Hidd 
The fount planes are uniformly striated vertically, and 
the oes are not A eipe rounded by the oscillatory 
xxi, p. 1 
* Vol. xxi 
+ The engraver, “ pa ie i put the lettering of the cuts in capitals instead 
of small letters 
