Any ideas for repairing a chipped marble rolling pin?

Seeds thought this was worth mentioning said
4

It’s just a rolling pin from Marshalls- not an antique or anything, but my wife really liked using it and it got chipped while sitting in the sink. The chipped area is crumbling now, and I’d like to try to fix it before it spreads more. I thought maybe epoxy, but I’m not sure how food safe that is and I don’t know how I’d keep it round. It was cheap enough that it wouldn’t be worth bringing it to a counter place or anything (the main suggestion I saw on the internet).

Any thoughts?