Examples from the Web for touchstone
When we were taping the premiere, he was the touchstone in my head of, “Am I working hard enough?”John Oliver on ‘Last Week Tonight,’ Turning Down CBS, and ‘Nauseating’ American Politics|Marlow Stern|May 1, 2014|DAILY BEAST
On this, and on the variations of pain, you mentioned a passage in War and Peace that was a kind of touchstone.Susan Minot on Africa, Joseph Kony, and the Limits of Writing About Love|Lea Carpenter|February 10, 2014|DAILY BEAST
Hating what the Wall has become is a touchstone of identity.
Published by Touchstone Books, a division of Simon & Schuster, Inc.Inside Tania Head’s Terrible 9/11 Lie: ‘The Woman Who Wasn’t There’|Robin Gaby Fisher, Angelo J. Guglielmo, Jr.|April 6, 2012|DAILY BEAST
He is, instead, excavating the origins of a touchstone of the contemporary political debate.
Touchstone's question, 'Hast any philosophy in thee, shepherd?'The Letters of William James, Vol. 1|William James
Whenever she applied the touchstone of character, she realized how little alloy there was in the pure gold of his nature.Life and Gabriella|Ellen Glasgow
Touchstone alludes to a certain knight, that swore by his honour they were good pancakes.Folk-lore of Shakespeare|Thomas Firminger Thiselton-Dyer
This little work serves me as a touchstone; he to whom it says nothing personal has probably nothing to do with me either.Friedrich Nietzsche|Georg Brandes
Jacques was a philosopher, and Touchstone a great personage.The Autobiography of a Clown|Isaac Frederick Marcosson
British Dictionary definitions for touchstone
Word Origin and History for touchstone
late 15c., from touch (v.) + stone (n.). Black quartz, used for testing the quality of gold and silver alloys by the color of the streak made by rubbing them on it. Cf. also basalt. Figurative sense is from 1530s.