About two miles northwest of Center Strafford, in southeastern New Hampshire, a pegmatite is quarried for feldspar and mica. It is especially interesting for its abundance of unusual phosphates; in particular triph-ylite, graftonite, fairfieldite, and a number of their alteration products. Also noteworthy is the relative abundance of loellingite. These complex constituents make up only about 10 per cent of the pegmatite, microcline, muscovite, and quartz constituting the remainder.

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