The general consensus among jewelry experts is that solid gold is the only way to guarantee your jewelry will remain tarnish-free. That said, many budget-friendly brands have put a new gold-plating technique into practice, and so far it’s seen impressive results. Known as physical vapor deposition (PVD), this new technique is ten times thicker than regular gold plating, making pieces much less susceptible to corrosion, tarnishing, or fading. Comparing the real-deal investment pieces with these cost-friendly PVD picks, we’ve yet to notice a difference in the tarnish-free stakes following several showers, sea swims, and sweat sessions.