Precious metal
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Precious metal is a rare metallic chemical element of high, durable
economic value.
Chemically, the precious metals are less reactive than most
elements, have high luster, and have higher melting points than
other metals. Historically, precious metals were important as
currency, but are now regarded mainly as investment and industrial
commodities. Gold, silver, platinum and palladium though are still
internationally recognized as forms of currency under ISO 4217.
The best-known precious metals are gold and silver. While both have
industrial uses, they are better known for their uses in art,
jewelry, and coinage. Other precious metals include the Platinum
group metals: ruthenium, rhodium, palladium, osmium, iridium, and
platinum, of which platinum is the most widely traded. Plutonium and
uranium could also be considered precious metals.
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The demand for precious metals is driven not only by their practical
use, but also by their role as investments and a store of value.
Palladium is, as of February 28 2006, valued ($284 USD per ounce) at
a little over half the price of gold ($561 USD/ounce), and platinum
($1,050 USD/ounce) at about twice that of gold. Silver is
substantially less expensive ($9.77 USD/ounce) than these metals,
presently at 1/58 the price of gold, but is often traditionally
considered a precious metal for its role in coinage and jewelry.BullionPrecious metals in bulk form are known as bullion, and are traded on
commodity markets. Bullion metals may be cast into ingots, or minted
into coins. The defining attribute of bullion is that it is valued
by its mass and purity rather than by a face value as money.
Many nations mint bullion coins, of which the most famous is
probably the gold South African Krugerrand. Although nominally
issued as legal tender, these coins' face value as currency is far
below that of their value as bullion. For instance, the United
States mints a gold bullion coin (the Gold Eagle) at a face value of
$50 containing 1 troy ounce (31.1035 g) of gold — as of January
2006, this coin is worth about $550 as bullion. Bullion coins'
minting by national governments gives them some numismatic value in
addition to their bullion value, as well as certifying their purity.
The level of purity varies from country to country, with some
bullion coins of as pure as 99.99% available (the Canadian Gold
Maple Leaf coin meets this standard). Note that a 100% pure bullion
is not possible, as absolute purity in extracted and refined metals
can only be asymptotically approached.
One of the largest bullion coins in the world is a 10,000 dollar
coin minted in Australia which consists of a full kilogram of 99.9%
pure gold; however China has produced coins in very limited
quantities (less than 20 pieces minted) that exceed 260 troy ounces
(8 kg) of gold.
Gold as an investment and silver as an investment are often seen as
a hedge against both inflation and economic downturn. Silver bullion
coins have become popular with coin collectors due to their relative
affordability, and unlike most gold and platinum issues which are
valued based upon the markets, silver issues are more often valued
as collectables, far higher than their actual bullion value.
A given metal is precious if it is rare. If mining or refining
processes improve, or new supplies are discovered and exploited, the
value of such a metal declines.
An interesting case of a precious metal going common is that of
aluminum. Aluminum was, when it was first discovered, extremely
difficult to separate from the ore it was part of and, since the
whole of the Earth's aluminum was bound up in the form of compounds,
the most difficult metal on earth to get, despite the fact that it
is one of the planet's most common.
For a while, aluminum was more valuable than gold; bars of aluminum
were exhibited alongside the French crown jewels at the Exposition
Universelle (1855). However, the price dropped continually and
collapsed altogether when an easy extraction method, the Hall-Héroult
process, was discovered in 1886.
The rarity of various metals may again be in for a shift, however.
According to USGS statistics, at current production rates all the
gold in the earth's crust will theoretically be processed within
several decades. Meanwhile, silver is in a structural supply
deficit, with 300 million troy ounces (9,000,000 kg) more being
consumed each year than is mined--it may currently be more rare than
gold. |
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