
Have a heart of stone
Emotional Weight
The phrase carries negative emotions and indicates harshness in someone's personality.

He dismissed their pleas without remorse; he must have a heart of stone.
Metaphorical Use
It's not literal — nobody has an actual stone heart. It's a metaphor for lack of empathy.

I can't believe she just laughed at his misfortune. She has a heart of stone.
Character Assessment
Used to judge character, often indicating surprise or disapproval at one's cold behavior.

Even though he's rich, he never donates to charity. He has a heart of stone.
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