I have a heart of stone.

我有一副铁石心肠。

youdao

If this happens, I might think that you have a heart of stone.

如果你是一位非常好的人，我还会说你有一颗金子般的心。

youdao

After a few more miles they met a country woman who said to the old man, "You must have a heart of stone."

他们又走了几里路，遇到了一位乡村妇人，她对这位父亲说：“你一定有一副铁石心肠。”

youdao

If this happens, I might think that you have a heart of stone.

VOA: special.2010.07.11

" To the gardeners and janitors of the Vatican, "If we have a closed heart, we have a heart of stone.

CNN: Pope Francis' gestures strike fire in our hearts