Labradorite. A kind of feldspar, commonly showing a beautiful play of bluish-gray colors, and, hence, much used for ornamental purposes. The finest specimens come from Labrador.

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“God hath caused many wants and weaknesses in us that we may be useful to one another; and has purposely given a diversity of gifts and graces, that we may be helpful to each other.”
–The Works of George Swinnock