Gold Quality
Gold's purity is measured in karats. The term "karat" harks back to the ancient bazaars where "carob" beans were used to weigh precious metals. 24 karat is pure gold, but its purity means it is more expensive and less durable than gold that is alloyed with other metals. Different alloys are used in jewelry for greater strength, durability and color range.

The karatage of the jewelry will tell you what percentage of gold it contains: 24 karat is 100 percent, 18 karat is 75 percent, and 14 karat is 58 percent gold. When comparing gold jewelry, the higher the number of karats, the greater the value.

Europeans have long embraced 18-karat gold as their metal of choice, and with good reason. Its rich yellow color, luxurious look and feel have an extraordinarily sensual appeal; many European women treat 18-karat gold like a second skin, even wearing it to the beach!

Today, women in the U.S. and around the globe are "trading up" and treating themselves to the beauty and opulence of 18-karat gold.

Karat Marks
When buying gold jewelry, always look for the karat mark. All other things being equal, the higher the karat, the more expensive the piece. In the United States, 14-karat gold, or 583 parts pure gold, is the most common degree of fineness. Nothing less than 10 karats can legally be marked or sold as gold jewelry in the U.S. However, lower karatages, such as 8-karat gold and 9-karat gold, are popular in other countries.

18-karat gold is 18/24ths, or three-quarters pure gold, and jewelry of this fineness is marked 18k or 750, the European designation meaning 75% gold.

Always look for the karat mark or "k" that appears on the back of the piece. By U.S. law, if a karat mark appears you should also see the manufacturer's trademark to assure you that the karat marking is accurate. The country of origin should also appear.

In addition to the karat mark, every piece of gold jewelry should be stamped with a hallmark or trademark of its maker, and sometimes its country of origin. These designations assure you that you are buying genuine karat gold jewelry. Heavier pieces contain more gold.

Gold Types
Gold Filled, also called Gold Overlay, refers to a layer of at least 10-karat gold that has been permanently bonded by heat and pressure to one or more surfaces of the support metal, then rolled or drawn to a prescribed thickness. The karat gold must be at least 1/ 10 of the total weight.

Gold Plate means that a layer of plating of 10-karat gold or better has been bonded to a base metal. The karat gold content may be less than 1/20, but it must be properly identified by weight in terms of total metal content.

Gold Leaf is just gold plating that's been pounded and applied by hand.

Gold Colors

Yellow gold is alloyed with silver and copper. It is the most frequently used type of gold there is. Malleable, ductile, and generally non-corrosive, it has a high melting point and is not susceptible to compression.