Color first
- White: the modern default, makes near-colorless stones look icy.
- Yellow: classic, warm, very much back in style, and forgiving on lower color grades.
- Rose: distinctive and romantic, flatters most skin tones, slightly harder to match with other jewelry.
The tell: whatever metal dominates her current earrings, necklaces, and bracelets wins. Mixed metals? Then any of them work, pick for the stone.
14k or 18k
Higher karat means more pure gold: richer color, higher price, softer metal. 14k is harder and shrugs off daily wear. 18k is warmer and scratches a bit easier. For a ring worn every day, 14k is the sensible default, 18k the luxurious one. Both are excellent.
Platinum vs white gold
- White gold is gold alloyed pale and plated with rhodium. The plating wears over the years and needs occasional re-plating to stay bright. Cheap to do, mildly annoying to remember.
- Platinum is naturally white forever, denser, hypoallergenic, and more expensive upfront. It scratches into a soft patina rather than wearing thin.
Daily wear plus sensitive skin plus no-maintenance preference points to platinum. Otherwise white gold does the job for less.
Bottom line
Copy the metal she already wears, default to 14k, and upgrade to platinum only if forever-white and zero upkeep matter to her.