417. 
418. 
419. 
431. 
432. 
433. 
Mineralogical Cabinet. 27 
Genus VI. Perauine-Srar. 
Sp. 1. Prismatic Petaline-Spar. Triy, Petalite. 
. Bolton, Massachusetts. Bluish white, with a tinge of 
pink. 
. Bolton, Massachusetts. White, and containing green 
pyroxene, with minute black crystals, not yet ascer- 
tained, 
. Sweden. White. 
Genus VII. Fexpspar. 
Sp. 1. Rhombohedral Feldspar. Triv. Sommite. 
- Monte Somme. In small, white, six-sided prisms, upon 
lava. 
Sp. 2. Prismatic Feldspar. Triy. Feldspar. 
. Salzburg. In white crystals, some of which contain 
chlorite. 
- Mount St. Gothard. In white transparent crystals, 
do. Var. Adularia. Sections of large 
crystals. 
. Mount St. Gothard. do. 
» Haddam, Cynnecticut, Var. Albite, with quartz, mica, 
and black tourmaline. 
- Haddam, Connecticut. Var. Albite; greenish white, 
and translucent, with pinite, tourmaline, and quartz. 
Oakham, Massachusetts. Var. Adularia ; slightly cha- 
toyant. 
. Chesterfield, Massachusetts. Var. Cleavelandite ; at- 
tached to granite, and containing crystals of rubellite. 
Chesterfield, Massachusetts. Var. Cleavelandite; em- 
bracing green tourmaline and rubellite. 
. Mount Vesuvius. Var. Ice-spar. 
. Chester, Pennsylvania. Common feldspar. 
do. do. 
Boxborough, Massachusetts. Common feldspar; lami- 
nated, and fine granular; color milk white. ’ 
