Geology and Mineralogy of a part of Massachusetts, fe. 37 
CLASS II. 
1. QUARTZ. © 
1. Common Quartz. 
Var. 1. Limpid. 
Hexaedral prisms terminated at one extremity by a six 
sided pyramid—two sides often wider than the others—at 
Lenox, Williamstown, Lee, and Lansingburgh. Also in 
Chatham. Eaton. In Middlefield, in minute pyramids, in 
cavities of serpentine lined with quartz. Emmons. 
Quartz with dendritic forms, Southampton mine. HKmmons. 
Var. 2. Smoky. 
Often occurs in granite. In hexaedral prisms in Siu 
bridge. On Monument Mountain a crystal was found 
nearly a foot long, and some inches in diameter, and must 
have weighed several pounds. It was broken by the dis- 
coverer, and I have only a large fragment of it. It is very 
beautiful. Middlefield in rolled specimens, onthe banks of 
streams. Emmons. 
Var. 3. Rose Red. 
Williamstown, only a specimen. In Chester, it is found 
in granite. Emmons. 
Var. 4. Irised. 
In rolled masses—beautiful—in Middlefield. Emmons. 
Plainfield. Porter. 
Var. 5. Greasy. 
Williamstown, New Ashford, Lenox, and Middlefield. 
Var. 6. Pubiliir!’ 
Middlefield. Emmons. 
