Geology and Mineralogy of a part of Massachusetts, Gc. 43 
Green Feldspar. ‘This rare sub-variety” is found in 
Chesterfield. Also abundant in the granite at Chester. 
Emmons. Rather pale green, colour not uniform, struc- 
ture foliated, less lustre than the lighter varieties. 
Var. 2. Siliceous. 
Bluish white, lamina often curved, and sometimes of a 
“ stellular form’’——abundant in Chester. Emmons. It is 
the same as that at Chesterfield. It is probably in the 
same bed as that at Chesterfield. 
Albite. The siliceous feldspar of Chesterfield passes 
into a granular variety, almost exactly resembling the al- 
bite of Sweden. In Chester, it is fine and coarse granular. 
Var. 3. Glossy. 
Quadrangular prisms in granite, abundant at Chester. 
Emmons. ; 
Var. 4. Compact... 
Found sometimes with the preceding. 
10. JADE. 
Subsp. Wephrite. 
Found on Westfield river. Very tenacious, scratches 
quartz, pale green, oily aspect, splintery fragments, and 
fracture dull—rare. Emmons. . ' 
1]. BERYL. 
Six sided prisms and amorphous, often fine delicate green 
—sometimes five inches in diameter, in granite at Chester 
and Norwich. Emmons. Also, in similar and large crys- 
tals in Worthington—sometimes whitish. 
