70 JOURNAL OF THE 
CHABAZITE. 
Occurrence.—As described on page62, this mineral is 
intimately associated with the wellsite, at the Buck 
Creek (Cullakanee) corundum mine in Clay Co., occurring 
as a mass of small crvstals coating the feldspar, horn- 
blende and corundum. ‘Thus far this mineral has been 
found only at the large open cut on the eastside of Buck 
Creek, just northwest of the shaft. 
The crystals are transparent to white and very small, 
no crystal being found that measured over one millimeter 
in diameter. | 
The only form observed on any of these,crystals was 
the unit rhombohedron, 1011, which occurs as simple 
crystals and also as penetration-twins, with c, as the 
twinning axis. . 
Chemical analysis.—In obtaining material for analysis, 
the crystals of the chabazite and wellsite, freed as far as 
practicable from the feldspar and hornbleude were 
crushed and sifted toa uniform grain. By means of the 
heavy solution, the chabazite was separated from the 
wellsite and also from any feldspar or hornblende that 
may have been attached to them. All of the chabazite 
Hoated, when the specific gravity of the solution was 2./- 
278, while the weillsite and heavier minerals sank to the 
bottom of the separatory funnel. These were drawn off 
and the solution diluted toa specific gravity of 2.244, but 
only a small per cent. of the mineral sank. This being 
drawn off, the solution was further diluted to a specific 
-gravity of 2.203, when nearly half of the remaining min- 
eral sank. This was removed and saved for analysis, 
(II, below) and the solution again diluted. When the 
specific gravity had been lowered to 2.147, all, but a small 
amount of the mineral came dawn, and this was saved for 
anatysis. (1) <A preliminary experiment had been made 
-with the crystals of the chabazite and these were found 
to vary considerably in specific gravity. 
