touchstone

[tuhch-stohn]

noun

1. a test or criterion for the qualities of a thing.

   Synonyms: pattern, model, measure, standard

2. a black siliceous stone formerly used to test the purity of gold and silver by the color of the streak produced on it by rubbing it with either metal.

touchstone

/ ˈtʌtʃˌstəʊn /

noun

1. a criterion or standard by which judgment is made

2. a hard dark siliceous stone, such as basalt or jasper, that is used to test the quality of gold and silver from the colour of the streak they produce on it

Word History and Origins

Origin of touchstone¹

First recorded in 1475–85; touch + stone

Example Sentences

“Glaciers are touchstones between the past and the present, and it’s just so visceral when you can see how it used to be and how it is today,” Jones said.

From Los Angeles Times

"This memorial would be a touchstone honouring a shared history and bringing communities together."

From BBC

The Westside Pavilion was one of the city’s premier shopping venues and a cultural touchstone for generations of Angelenos, appearing in movies, television shows and music videos.

From Los Angeles Times

While the Menendez case has become a touchstone in the true-crime genre spawning viral debates about abuse, privilege and punishment, the parole board’s decision rested on prison records and behavioral assessments, not public opinion.

From Salon

Country music has long been a conservative cultural touchstone, valorizing patriotism, liberty and small-town Americana.

From Salon

Related Words

• barometer 
• criterion