621. 
622. 
623. 
625, 
628. 
629. 
Mineralogical Cabinet. 37 
. Ackworth, New-Hampshire. Portion of a crystal of 
yellow beryl. 
. Haddam, Connecticut. Massive; color yellow; with 
chrysoberyl and garnets. 
Goshen, Massachusetts. Massive ; color greenish white; 
with cleavelandite and blue tourmalines, in granite. 
Genus VI. Quarrz. 
Sp. 1. Prismatic Quartz. Triv. Iolite. 
. Bodenmais, Bavaria. Crystallized, and massive. The 
form of the crystal is a six-sided prism, with the lat- 
eral edges slightly replaced; with iron pyrites. 
Sp. 2. Rhombohedral Quartz. Triv. Quartz. 
. Chesterfield, Massachusetts. In dull grey crystals, ap- 
parently possessed of the form of the primitive rhom- 
boid, with its lateral solid angles replaced by trian- 
gular planes; in granite. 
. Craig-Lockart, Scotland. A single crystal in the form 
of the dodecahedron, with triangular faces. 
. Alps. Crystallized in the form of the double six-sided 
pyramid, having the edge formed by the meeting of 
the pyramids, slightly replaced. Crystals smoky, 
and possessed of a high lustre ; upon agate, and form- 
ing a portion of a large geode. 
. Marmarozh, Bannat. In crystals imbedded in clay 
slate. Similar to No. 627, except, that the replace- 
ment of the edge formed at the meeting of the py- 
ramids is greater,—-thus giving rise to the six-sided 
prism terminated by six-sided pyramids, the more 
common form of quartz. 
. Plainfield, New-York. Single crystal, like 628, with 
the alternate solid angles formed at the meeting of 
the prism and pyramid, replaced by small rhombic 
planes; the replacements upon one extremity of the 
prism corresponding, or being opposite te those upon 
the other. 
