In The us, strict guidelines govern gold purity labeling. To be labeled as a certain karat, a solid item has to be within a few sections for each thousand from the karat marking. In the event your sterling silver does get tarnished, an easy sprucing fabric will bring that glow https://tedomarket.com/product/jewelry-watches-2/mens-watches-jewelry-watches-2/mechanical-watches/men-leather-wrist-watch-dual-display-cartier-mens-leather-wrist-watch/