Local Quiz

[Scothern20]

Local quiz.
This is a local quiz where all the answers contain the word 'stone'.
The clue is:- 'An important quality or feature.'
Thanks in advance for any help.

[sandyRoe]

keystone

[clairerob21]

milestone

[dannyk13]

Keystone?

[scorpiojo]

Cornerstone?

[sandyRoe]

Milestone is better ^

[Scothern20]

Thank you sandyRoe

[sandyRoe]

As is cornerstone. But, on reflection, keystone isn't bad.

[scorpiojo]

cornerstone
ˈkɔːnəstəʊn/
noun
noun: cornerstone; plural noun: cornerstones; noun: corner-stone; plural noun: corner-stones
1.
an important quality or feature on which a particular thing depends or is based.
"a national minimum wage remained the cornerstone of policy"
synonyms: foundation, basis, keystone, mainspring, mainstay, linchpin, bedrock, fundament, base, key, fundamental principle, main ingredient, central component, centrepiece, core, heart, centre, focus, crux, prop, backbone, anchor
"the theory of natural selection is a cornerstone of biological thought"

[mallyh]

milestone

[mallyh]

there were no answers when i started looking lol