Why a wishbone
The tradition of two people pulling a wishbone and the winner making a wish goes back a very long way. What's stayed is the meaning: hope, and a bit of luck on your side. It isn't romantic, isn't religious, and doesn't require you to know anything about someone's beliefs — which is what makes it such an easy thing to give.
Why the earrings rather than the necklace
The necklace states it. The earrings imply it. At conversational distance the shape reads as a clean geometric V, and only up close does it resolve into a wishbone — so it works for an office, an interview, or anyone who finds symbol jewellery a little loud.
Why it lasts
Stainless steel with 18K gold plating. It won't tarnish, which matters for a piece given to mark a moment someone might want to keep for years.