hard as a rock

(redirected from hard as stone)

*hard as a rock

 and *hard as stone
very hard. (*Also: as ∼.) This cake is as hard as a rock! I can't drive a nail into this wood. It's hard as stone.
See also: hard, rock
References in classic literature ?
The floors of the rooms were of the same composition, and as hard as the earthen floors we have in use in several parts of England; as hard as stone, and smooth, but not burnt and painted, except some smaller rooms, like closets, which were all, as it were, paved with the same tile; the ceiling and all the plastering work in the whole house were of the same earth; and, after all, the roof was covered with tiles of the same, but of a deep shining black.
I'm the only one among you who has any heart: all the rest are as hard as stones -- Magdalen included.
for many of the plums were not ripe, some were hurt by the birds, some crushed in falling, and many as hard as stones.