Sterling Silver Blue Heart Crystal Pendant Necklace

GIFT IDEAS Valentine's day gifts，Anniversary gifts,Engagement gifts or Wedding gift,Mom Gifts, best friend gifts, bridesmaid gifts, teen girl gifts, girls gifts,Birthday gifts ,Christmas Gifts.Attributes of 925 Sterling Silver Hallmark.If your item contains a S925 hallmark, it is sterling silver.  Oxidization. When silver is exposed to air, it oxidizes. The oxidization of the silver causes the metal to tarnish and take on a black tint over time. If you see black tone after a period of use, the item is sterling silver. Magnetic. Like gold and platinum, silver is a non-ferrous metal-it is not magnetic. Run a strong magnet over your item. If the item is not attracted to the magnet, it is made out of a non-ferrous metal. Keep the silver away from substances that will cause tarnish. Anything that contains sulfur will cause silver to tarnish. To prevent this from happening, keep your silver away from things like:Sweat,Rubber and latex,Food items like mayonnaise, mustard, eggs, and onions,Woo