Yellow gold adds warmth to everything it touches, including colored stones. White gold's neutral finish keeps out of the way and lets the gem show its actual color. For anything color-forward, the setting metal matters.
Visually Speaking
At the top edge, the bail frames the transition from chain to pendant. Its surface finish, width, and shape stay visible, so they affect the finished look.
Stone Story
For jewelry worn consistently rather than occasionally, sapphire's hardness is the practical choice. Second only to diamond in scratch resistance, it handles daily contact in rings and bracelets without the wear-related considerations softer stones require.