All jewellery will tarnish over time, even the most expensive jewellery tarnishes. This item is in the category Jewellery & Watches\Fashion Jewellery\Earrings. HOW TO PROTECT YOUR JEWELLERY. Thick 18k gold gf made with swarovski crystal double heart half hoop earrings green coloring on the skin comes off with soap and water, and polishing copper jewelry is as easy as finding an acidic item in the kitchen.