gold record
Noun
Meaning
gold record (plural gold records)
(US) An album or single that has sold 500,000 or more copies.
Examples
After all those days in the cotton fields, the dreams came true on a gold record on a piece of wood. It's in my den where I can look at it every day. I wear it out lookin' at it.
As far as my solo record, I don't want a gold record or anything, I'm happy to be small and to have the people appreciate the music who really like me for being me.