Definition of "living stone" []

• Any plant of the genus Lithops native to Africa having solitary yellow or white flowers and thick leaves that resemble stones (noun)

WordNet. Princeton University. 2010.

• "In a great hall with pillars hewn out of the living stone sat the Elvenking on a chair of carven wood."
• "And one of the brutes he’d seen swimming in Cala Bay wore a living stone around its neck."