Peter Andre’s (Singer, Actor, etc) wife Emily McDonagh (NHS Doctor) has a platinum and Diamond ring. The Diamond @10mm in diameter is in a halo setting with split diamond set sides.
Made for them by HG Bespoke in London.
One of my favorite people, Sarah Jessica Parker started out with what looks like a rose gold wedding band, added a very large diamond ring and now wears a modest T&Co platinum solitaire!