The phrase 'a mark of excellence' is correct and usable in written English.
You can use this phrase to describe someone or something that is particularly noteworthy, skillful, or impressive. For example, "His outstanding performance was truly a mark of excellence."
"Everything I do has a mark of excellence on it".
Activities: Board Certification is a mark of excellence and a distinguishing accomplishment.
Miguel Cabrera's winning the Triple Crown — truly a mark of excellence — certainly provided one of those moments.
The most familiar campaign from Ayer, a unit of the B Com3 Group, celebrated the G.M. logo as a "mark of excellence"; the most recent centered on the loyalty of owners of General Motors vehicles as demonstrated by repeat purchases.
The helmet would have been worn, possibly with colourful streamers attached, as a mark of excellence by Roman soldiers at sport parades.
More than half of all foundation trusts - which are given foundation status as a mark of excellence - are now in the red, Monitor's quarterly report warned.
"Your graduate degree is a testament to your talent and commitment as well as a mark of true excellence in scholarship and research.
Boringly but tellingly, James's film turned out to be a unanimous choice, a mark of its excellence given that the shortlist didn't have a bad movie on it.
The title would be a "mark of vocational excellence" argues the Commission on the Future of Higher Education.
In doing so, they can change the nature and direction of an organization and leave a sustained mark of excellence for generations to come.
It achieved Foundation Trust status - a supposed mark of excellence in the health service - in 2008.
