I recall hearing the expression “An orangutan with a Stradivarius” when I was in college. It meant that some crude underserving person had possession of some thing of great quality. Likely, the fathers of girls I aspired to date in college had this thought about me and their daughters.
As it turns out, orangutans actually make crude musical instruments. These instruments are not made for cultural reasons, but for the practical purpose of scaring predators. Read more here.