heart of stone

heart of stone idiom
A very cold and unfeeling nature, as in You'll get no sympathy from her; she has a heart of stone. This idea dates from ancient times and in English appeared in the Bible (Job 41:24). [Early 1600s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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