Name:   Pegmatite

Geologic Name:  None

Reference: Cameron, Eugene, N., and others:  Pegmatite Investigations 1942-45,
New England, U.S.G.S. Prof. Paper 255, 1954

Microscopic characters: Coarse pegmatitic intergrowth of quartz and microcline
perthite.  A small amount of muscovite is present.