No Pokemon evolves by hard stone. Hard stone just increases the power of rock type moves.
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No Pokémon are capable of evolving with the use of the Hard Stone item since it is not an evolution stone the Hard Stone is an item that powers up the moves of the holder's Rock-type attacks.
A hard stone is a hold item, to give to a Pokemon to make their rock (or ground)type moves stronger. It doesn't make any Pokemon evolve.
In the Pokemon Games, the Dawn Stone is an evolutionary stone that will help two different Pokemon evolve. When exposed to a Dawn Stone, Snorunt's evolve into Froslass and Kiralia's evolve in Gallade.
Two Pokemon can evolve if exposed to the Dawn Stone. A Snorunt will evolve into a Froslass, and a Kiralia will evolve into a Gallade.
Petilil will evolve with a sun stone, pansage with a leaf stone, panpour with a water stone, and pansear will evolve with a fire stone.
Lombre can evolve into Ludicolo with a Water Stone (Lombre can also be traded to evolve).