Carclaye, a range of moorish downs, 2 miles N of St Austell, in Cornwall. It has an altitude of 665 feet, and commands an extensive view. Its substance some way down from the surface is disintegrated schorlaceous granite, and deeper down comparatively compact granite. A tin mine, open to the day, has been worked in it from time immemorial, is now about a mile in circumference and fully 130 feet deep, and exhibits a striking contrast in the whiteness of its cliffs to the sombreness of the surrounding moor. Ancient implements, said to be Phoenician, have been found here.