I was under the impression that saints’ relics are supposed to be in the altar somewhere.
At my in-laws’ parish, they have a relic of their patron saint displayed in the foyer, under a large holy water fountain surmounted by a statue of the saint herself. It looks to me like a bone chip. It’s in a circular case fronted with either glass or plastic.
Is this OK? It just seems sort of… I dunno… a little irreverent.