Difference between Stonyhearted and Hardhearted

What is the difference between Stonyhearted and Hardhearted?

Stonyhearted as an adjective is cruel, compassionless, discompassionate, as if having a heart made of stone. while Hardhearted as an adjective is lacking in compassion; cold and pitiless.

We hope you now know whether to use Stonyhearted or Hardhearted in your sentence.