With gold and platinum prices at all-time highs, lots of folks are buying sterling silver jewelry instead. Did you know that silver is the whitest metal, even whiter than platinum or rhodium? That's why a flat, polished silver surface makes a perfect mirror. Only problem is, it tends to tarnish, meaning that the surface silver molecules combine with oxygen, and when they do, they form silver oxide, which is black! Quite a contrast! That's why, to make a mirror, the silver is covered with glass, or actually the glass is coated with silver: the glass blocks the oxygen and prevents tarnish.
Since you can't buy glass-coated silver jewelry, you can expect it to tarnish eventually. Some silver jewelry is plated with rhodium to prevent tarnish, so you should NOT polish this type of silver, because it will remove the plating! Though rhodium is a platinum-group metal, it is not quite as white as silver, so there are some advantages to leaving the silver au naturale, and we will talk about that in a minute. By the way, the Viridian Gold Jewelry Store will always tell you if one of our jewelry pieces is rhodium-plated, so that you will know how to care for it. Rhodium plating is also commonly used on white gold jewelry.
Some silver jewelry just doesn't need regular polishing, because tarnish is kept at bay by skin oils and regular washing. That means that an item worn against the skin, such as a cross on a chain, or a ring, tends to stay relatively tarnish-free. Except when it is exposed to some harsh chemicals which accelerate oxidation. For instance, if you wear a silver neck-cross and go swimming in a chlorinated pool, the cross will quickly turn black! But, swim in a lake or spring-fed pool (like our Barton Springs pool here in Austin!), and nothing happens.
Silver is, as the chemists say, "highly reactive". Some substances besides oxygen, especially sulfur and chlorine, will combine with the silver to form compounds which are black in color. So, if your water supply is high in sulfur (well water is sometimes this way), or is loaded with chlorine, you will have a problem with silver tarnish. And, some folks' skin oils contain chemicals which can accelerate tarnishing, because of their particular body chemistry or diet.
So, how to clean the polish? Well, you could use silver polish, and that works great--some polishes leave behind a film which helps prevent tarnishing (but that quickly wears off of a piece of jewelry that gets handled). Or, you could do what I do--just put a little toothpaste on your fingers and rub it on the piece, then rinse with water. Quick, convenient and cheap. Remember, though: Don't polish silver that is rhodium plated!
If the silver item is something that is not in constant contact with your skin, such as earrings or a brooch, then you need to make sure you store the jewelry item in an air-tight container or in a tarnish-inhibiting cloth.
What could possibly be good about silver tarnish? Well, the tarnish adds a beautiful aged effect to silver items, because it tends to darken the recesses of the piece where silver polish does not reach. This effect gives a unique dramatic character to silver jewelry that sets it apart from gold and platinum, making it a great choice for both casual and formal wear!
William Long is the president and founder of The Viridian Gold Jewelry Store -- check his jewelry information blog at http://viridian-gold-nuggets.blogspot.com for helpful tips and entertaining facts! Viridian Gold also carries platinum and sterling silver jewelry, and has a broad selection of Religious and Family jewelry items.
0 comments:
Post a Comment