An apparatus for splitting stones and blocks comprises means (5A, 6A) for supporting a stone or block while it is subject to a splitting operation, a unit which includes an upper blade (1) for engaging an upper surface of the stone or block and a lower blade (10) for engaging a lower surface of the stone or block, means (5) for effecting movement of the upper blade (1) downwardly towards the lower blade (10), a base (1A, 3A), and resilient support means (11) acting between the base (1A, 3A) and the unit.