What 14k gold fill actually means

Gold plating is a film measured in microns, a flash of gold over base metal that wears through at the friction points within months. Gold fill is a different construction entirely: a thick layer of 14k gold pressure-bonded to a jeweler's brass core, by law at least 5% of the piece's total weight.
In practice, that means a gold fill chain worn daily keeps its color for years, not weeks. It survives sunscreen summers and the bottom of travel bags. It's the material vintage jewelry from the 40s and 50s was often made from, which is why so much of it still looks warm instead of worn out.
We use 14k gold fill for every gold element in the current chapters. Solid gold may come later for special releases. Plating won't, ever, because a piece named after a place should outlast the trip.
Care is simple: wipe with a soft cloth after wear, keep it dry when you can, store it in the pouch. The materials and care notes on every product page are specific to that piece.