Metal Alloys
Argentium™ Sterling Silver – This new tarnish-resistant sterling silver alloy is composed of 92.5% pure silver, germanium, and copper. The germanium imparts the alloy’s tarnish-resistant properties and also makes the metal more mar resistant. Consumers no longer need to constantly polish their silver to keep it looking like new. Argentium™ Sterling Silver only requires an occasional wipe with a clean soft cloth to retain its shine.
Fine Silver – This grade of silver is 99.9% pure silver and is used in bullion and jewelry making. Because this form of silver is fairly soft and very pliable, jewelers use it when knitting or crocheting with fine gauge silver wire. The purity of fine silver is such that is does not tarnish easily.
Sterling Silver – Sterling silver is 92.5% pure silver, and is usually alloyed with copper or other metal to improve its strength. However, it is the copper which causes the sterling silver to tarnish. Tarnish is caused by the oxidation of the copper when it is exposed to the environment. Keeping sterling silver in a sealed container when not being used will help diminish the oxidation process. When oxidation does develop, a number of commercially available silver polishes can be used to remove the tarnish.
Copper - In its pure state, copper exudes a bright rosy-pink color. When heated, copper can change from rosy-pink to red, blue, purple, green, and many colors in between. Copper will also oxidize quickly when exposed to the air. Untreated copper will fade from rosy-pink to red and finally a warm chocolate brown. When oxidation does develop, a commercial copper polish can be used to remove the tarnish. In addition, a quick dip in lemon juice or a light rub with ketchup will also remove light tarnish. Just be sure to rinse with clean water and dry promptly.