Crossword Genius

Igneous rock used in building (7)

Ross

I believe the answer is:

granite

(Other definitions for granite that I've seen before include "Constituent in Dartmoor" , "Very hard type of rock" , "Igneous rock, generally composed of feldspar and mica and quartz" , "Hard stone from Tangier" , "Tearing (anag.)" .)

I've seen this clue in the Sydney Morning Herald.
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