There are several idioms about the defects of jade:

White jade is flawless, and white jade is slightly flawed. The flaws are mutual. Yoga does not conceal flaws, and flaws do not hide yoga.

Which is closer to what you mean:

Defects don't hide Yu, which means that no flaw in jade hides its light. Metaphorically speaking, shortcomings do not affect the perfection of the whole. But it doesn't mean that it is more perfect with flaws.