Besides its appearance and worth, how is white gold different from gold?

sjhodges825

Gold as it comes out of the ground is a pure element that is yellow and relatively soft. That's your "24 karat gold." Many people like the yellow color of 24 karat gold, but the lack of hardness can be a disadvantage in jewelery, so it is alloyed with other metals. This affects the color in addition to the hardness. To make white gold, an alloy of palladium and nickel is added to the gold. Jewelers talk about other colors, too: add a little copper for a "pinkish" caste; if you want a "green" tint, add silver. Zinc is added to make the gold harder. The "karat" tells how much alloy of other metals is used -- 18k gold is 75% gold and 25% alloy, 14 karat has more alloy, etc. One might think that yellow gold would always be more expensive than white because it is "purer," but that isn't necessarily true. White gold can be more expensive because it's harder to fabricate. A good gold "manufacturer" is judged by his or her ability to use the different alloys to achieve the qualities desired in jewelry. The head of a ring that holds a gemstone, for example, must be hard but also flexible, so the alloy is important there. http://www.straightdope.com/mailbag/mwhtgold.html Jan 15 07, 3:14 PM