Granite pegmatite.
References:
Lavoie, Frank (1985): Recent Activity at the Chandler Mine, Raymond, New Hampshire (Rocks and Minerals 60:262,270-273)
Francis, C. A. (1985): Minerals of the Chandler Mine, A Zoned Lithium Rich Pegmatite (Rocks and Minerals, 60:263-264)
Mineral List:32 entries listed. 23 valid minerals. 2 erroneous literature entries.
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