Jewellery that does not tarnish is usually stainless steel, or a solid precious metal. Most "gold" fashion pieces are neither. They are a soft base with colour on top, and the colour moves.
Look for steel in the description, a gold or silver colour rather than a promise of solid gold, and a piece you are willing to shower in. If the listing tells you to take it off for water, it will tarnish.
The tarnish-free collection is that edit. Cuffs are the easiest place to start: gold cuff bracelets.