Gold and Silver
Gold and silver — 2 regal elements known as precious metals — have been prized for thousands of years for their beauty and rarity as well as their hardness and resistance to corrosion. Because of these qualities, precious metals are universal symbols of strength, wealth and power. They are a prized and indispensable part of any jewelry collection. Here are some basic facts and tips that will help you when you're shopping for fine jewelry of gold, silver or platinum.
Gold is the oldest precious metal known to humankind. The metal's luster and remarkable properties have allowed it to be crafted into the world's most coveted and exquisite jewelry.
Gold is the world's most malleable (able to be pounded thin) and ductile (able to be drawn to a fine wire) of all metals. In its pure state, gold is too soft to be worn for jewelry, so it is usually mixed with other metals, such as silver, copper, nickel and zinc, to make it harder. A mixture of metals is called an alloy. The quantity of gold in an alloy is expressed in karats
(abbreviated as k or kt). The following chart shows the proportion of pure gold in the most common karat counts:
Gold Purity by Karat Count
Here are the most common colors of gold alloys and the metals used in making them:
Colors of Gold Alloys
Wal-Mart gold jewelry is stamped with its karat
content (usually 10 karat, 14 karat or 18 karat), so you can be certain of the quality and value.
Gold-filled jewelry contains a layer of gold on a base metal. The percentage of gold must be at least 1/20 of the total weight of the piece.
Gold-overlay is a layering process in which a base metal is layered with gold. Gold-overlay jewelry is created with the following guidelines:
- Gold-overlay jewelry uses either 14kt or 10kt gold
A Sterling silver base that is coated or plated with gold or gold alloy, Vermeil jewelry is created with the following guidelines:
- The gold coating must never be less than 10kt in fineness.
- The minimum thickness for this coating must be 3 microns. (A micron is a measurement of thickness used in the jewelry industry.)
Silver has a long and noble history, second only to that of gold. Popular as a jewelry metal for thousands of years, it is harder than gold and much more plentiful. The abundant supply and ease of working it make silver more affordable and a good alternative to gold and platinum
(although it does tarnish and need polishing from time to time).
Sterling silver is a silver alloy
with a fixed standard of purity. It consists of 925 parts silver (out of 1,000) and 75 parts copper. Like gold alloys, sterling silver can be used to plate other metals.
Wal-Mart carries only genuine 0.925 sterling silver. In fact, all silver jewelry available on Walmart.com is guaranteed sterling silver and is stamped 925. This means that our silver is 92.5% silver and 7.5% copper. The benefit of copper is it makes silver more durable. Wal-Mart guarantees the purity of our sterling silver. All sterling silver items must pass the Wal-Mart Quality Control Inspection before the suppliers are allowed to ship the items to the store.