The phrase "a pure example" is correct and usable in written English.
It can be used to describe something that perfectly illustrates a particular quality or characteristic without any flaws or impurities.
Example: "Her dedication to her work is a pure example of professionalism in the workplace."
Alternatives: "a perfect example" or "an ideal example".
The claim made by government that our position is politically motivated is a pure example of doublespeak.
Otherwise, my life as a nun is a lesson to others, a pure example of good example.
Hurtubise is a pure example of the lone inventor, in the tradition of James Watt and Thomas Edison.
"I focused on the telephone because it was a pure example of communication, and there was very little written about the telephone's impact on society," said Fischer.
"It's just a pure example that if you're going to sustain a coalition, you have to talk about issues that matter to that coalition," Mr. Winston said.
Designed by Ludwig Mies van der Rohe and Philip Johnson, this sleek Park Avenue skyscraper is a pure example of a rectilinear prism sheathed in glass and bronze.
It would be hard to find a purer example of what might be called POTUS-splaining.
They're probably even a purer example than the oil well.
Thorpe became, for Camp, a purer example of masculinity — the myth of the Indian as primal warrior — whose dominance on the field confirmed how soft most young white men had become.
As a result, it argues that its service is perhaps a more pure example of the ride-share ideal since, hey, everything's voluntary and drivers don't have to go out of their way if they don't want to.
Each is a clear, pure example of the Colicchio philosophy at its most basic, whether a tart and tangy strawberry-rhubarb cobbler ($2.50), thin peanut butter cookies sandwiching sweet peanut butter cream ($2) or a moist, racy lemon tart ($1.50).
