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单词 polyphant stone
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> as lemmas

polyphant stone
In full polyphant stone. A kind of Cornish potstone, greenish-grey in colour.
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the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > talc > steatite > varieties
French chalk1728
potstone1741
Spanish chalk1760
polyphant stone1867
1867 Sci. Amer. 7 Dec. 358/3 There is a stone quarried in Cornwall, Eng., called the Polyphant stone, which can be cut by a hand saw with ease when first mined, but in time becomes exceedingly hard.
1899 S. Baring-Gould Bk. of West II. 88 In the porch under the stone bench, a hare hunt is carved on polyphant stone.
1931 Times 16 Oct. 17/6 The body of the hall will be built of polyphant, a greenish-grey stone.
1976 Encounter Oct. (back cover) (advt.) The plain work is in blue Forest of Dean stone and the decorative parts are in polyphant.
1978 Times 4 May 10/5 Here in the old polyphant quarry, overgrown with the kind of primitive Arthurian wood peculiar to Cornwall.
extracted from polyphantn.
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