Brinton’s Quarry is one of the most famous of the mineral localities in the serpentine rocks of southeastern Pennsylvania; it is the type locality for jefferisite, and is noted for the fine crystals of clinochlore that it formerly produced. An account of its present condition and list of minerals complete to date will therefore be of interest to collectors.

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First page of The minerals of Brinton’s quarry, Chester Co., Pa.
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