Care
Gold doesn't tarnish or turn your skin green. Wash it in warm water with a drop of dish soap, brush it gently with a soft toothbrush, and dry it with a soft cloth.
Fine chains are fine: take them off to sleep, for the gym, and before you pull on a sweater. Take everything off in a pool or a hot spring, since chlorine is hard on gold. Put pieces on after perfume and lotion.
18k is softer than 14k and 10k, so it picks up small marks sooner. That's the soft shine worn gold gets, and it suits it. Keep each piece in its own pouch so the chains don't knot.