Palladium for Jewelry
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| Platinum - Tiffany Rings |
Many people think of gold as the most precious metal. It may be the most traditional precious metal, but it's not the most expensive. Platinum is almost twice as expensive as gold, currently selling at well over $1,700 a troy ounce, compared to about $900 an ounce for gold. Rhodium, an even rarer metal, has been selling at prices as high as $9,000 an ounce in 2008.
With the popularity of white metals in jewelry during the last five years, platinum had become the metal of choice for high end jewelry, particularly wedding bands. Colored gemstones such as ruby, sapphire, tanzanite, spinel and tourmaline look stunning when set in white metal. But platinum has risen dramatically in price in the last 18 months. In January 2007, platinum was trading at around $1,100 an ounce. By January 2008, it had risen above $1,500 an ounce and went as high as $2,200 in March 2008 before falling to its current level around $1,700.
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| White Gold Tourmaline Ring |
The high price of platinum has led jewelers to recommend another member of the platinum group to their customers: palladium. Palladium is not as dense as platinum and has a lower melting point. But like platinum, it is tarnish resistant, electrically stable and resistant to chemical erosion as well as intense heat.
Palladium has been used as a precious metal in jewelry since 1939, as an alternative to platinum or white gold. This is due to its naturally white properties, giving it no need for rhodium plating. It is slightly whiter, substantially lighter but about 12% harder than platinum. It is also considerably cheaper, currently selling at around $380 an ounce.
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| Palladium Tanzanite Ring |
One of the unique properties of palladium is its ability to absorb hydrogen. When palladium is at room temperature and atmospheric pressure, it can absorb up to 900 times its own volume of hydrogen. Over half of the supply of palladium and its sister metal platinum goes into catalytic converters for automobiles, which convert up to 90% of harmful gases from auto exhaust (hydrocarbons, carbon monoxide and nitrogen oxide) into less harmful substances (nitrogen, carbon dioxide and water vapor).
Palladium bullion has ISO currency codes of XPD and 964. Palladium is one of only four metals to have such codes, the others being gold, silver and platinum. Palladium was discovered by William Hyde Wollaston in 1803. In 2005, Russia was the top producer of palladium, with at least 50% world share, followed by South Africa, the USA and Canada.
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