Schoonmaker Mine (Cramer Mine), Collins Hill, Portland, Middlesex Co., Connecticut, USA

Ref.: Rocks & Min.: 12:141-143. A mica and feldspar mine owned by A.O. Schoonmaker Co. of New York (Connecticut Mica & Mining Co.). Started 1933. Workings featured an 85 foot deep shaft.

Mineral List:

	Albite

	var: Cleavelandite

	Almandine

	Aragonite

	Beryl var: Aquamarine

	Biotite

	Cordierite

	Elbaite var: Rubellite

	var: Verdelite

	Fluorite

	Lepidolite

	Microcline

	Muscovite

	'Pinite'

	Pyrite

	Quartz var: Rock Crystal

	var: Smoky Quartz

	Schorl

18 entries listed. 9 valid minerals.

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