Sterling Silver Oval Blue Sapphire and CZ Princess Diana/Kate Middleton Ring This dazzling ring features a large oval-cut Blue Sapphire Cubic Zirconia encompassed by glittering clear Cubic Zirconia rounds Feel like a princess with this regal ring Crafted of 925 Sterling Silver Gift box included Can be delivered next Business Day! <span class="a-text-bold">Avoid exposure</span>:Contact with household chemicals, or any substances which contain sulfur will cause corrosion and tarnish  so its a good idea to remove silver jewelry when doing household chores. Direct sunlight also causes silver to tarnish, so be sure to take off your silver jewelry before you go swimming and sunbathing. <span class="a-text-bold">Storage</span>: As exposure to air tarnishes it, storing silver in airtight plastic bags with anti-tarnish strips is a great preventative measure. <span class="a-text-bold">Polishing:</span>You can use a special silver cloth to polish your items, but a lint-free flannel, microfiber, or other soft nonabrasive cloth will do as well.