Mining. Also 7–9 forestid, 8–9 fausted. [Of unknown origin.] Rarely pl. Chiefly attrib., as forstid ore (see quot. 1874).

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1653.  Manlove, Lead-Mines, 265.

        Cauke, Sparr, Lid-Stones, Twitches, Daulings, and Pees,
Fell, Bous, and Knock-barke, Forstid-oar, and Tees.

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1681.  Houghton, Compl. Miner, Forestid Oar, is Oar that is gotten out of Earth and Dirt that have been washed and Oar taken from it before.

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1747.  Hooson, Miner’s Dict., D iv b. With this [Bucker] they knock Ore, or anything that is mixed with Ore, Fausteds, &c. Ibid., M ij. All the Fausted Ore was to be Free.

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1802.  Mawe, Mineral. Derbysh., Gloss., 204. Fausted. Refuse lead ore, to be dressed finer.

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1874.  Gloss., to Manlove’s Lead-Mines (E.D.S.), Forstid-ore or Forestid-ore, ore that is gotten out of earth and dirt that has been previously washed and deprived of part of its ore, and left by the miners as rubbish.

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