Most jewellery uses a 0.5 micron gold coating. Ours is 2 microns — four times thicker. We use Physical Vapour Deposition (PVD) plating, a process where gold is bonded to the metal at a molecular level under vacuum pressure. The result is a finish that doesn't chip, fade, or tarnish. Our base is surgical-grade stainless steel — nickel-free, hypoallergenic, and built to last. Every Carryallco piece comes with a 5-year warranty because we mean it when we say it lasts.