Precious Metal Determinants: Rarity And High Economic ValueA metal is regarded "precious" if it's hard to find and is of high economical cost. Underneath these 2 factors, 9 metallic chemical factors qualify as precious metals. These are, in no specific order, gold, palladium, silver, rhodium, iridium, ruthenium, platinum, osmium, and rhenium. To ensure that although the chemical element tellurium is regarded as one with the rarest element inside the Earth's crust (its mass abundance becoming the exact same as that of rhodium, iridium, and ruthenium), its estimated price tag is only less than 5 U.S. dollars per troy ounce, and, therefore, can't be regarded as a precious metal. The same can be said of bismuth, which has a mass abundance half less than that of palladium, but with a price tag of only a little much more than a tenth of tellurium's price tag. In terms of mass abundance, expressed in parts per billion (ppb), here's how the nine precious metals are ranked (rare to rarest): 9th: silver (75 ppb); 8th: palladium (15 ppb); 7th: gold (4 ppb); 6th: osmium (1.5 ppb); 5th to 3rd: iridium, rhodium, and ruthenium (1 ppb); 2nd: rhenium (0.7 ppb); and 1st: platinum (0.003 ppb). The ranking appears various when the estimated world market prices, per troy oz, of these 9 precious metals are regarded as (estimates as of January 2010): 1st: Rhodium - USD2,750 2nd: Platinum - USD1,555 3rd: Gold - USD1,131 4th: Palladium - USD424 5th: Iridium - USD408 6th: Osmium - USD380 7th: Rhenium - USD194 8th: Ruthenium - USD173 9th: Silver - USD18 Of the nine precious metals, gold and silver are the best identified. Apart from becoming conventional coinage metals (along with copper), both gold and silver are also well known for their uses in jewelry and art; they likewise have particular industrial uses. A third crucial factor that will qualify an element as a precious metal, as may possibly be noted from the makes use of of gold and silver above, is that it ought to not be radioactive. Thus, the chemical factors actinium, polonium, and radium are not regarded as precious metals mainly because they're very radioactive. When compared to most other elements, precious metals are chemically less reactive, have greater melting points, and are more ductile - properties that make them ideal for several commercial and industrial applications. In earlier times, precious metals were mainly employed as currency. These days, nevertheless, they are very regarded as investment and industrial commodities. Four of them, in reality - silver, gold, platinum, and palladium -, are minted into coins or cast into ingots and traded on commodity markets. All four are assigned the ISO 4217 currency code. Hence, the role of precious metals as investments, on top of their practical use, drives the demand for them. For thousands of years, precious metals have demanded rates that are much greater than those of popular industrial metals, such as nickel (about 36 cents per troy ounce) and copper (about 11 cents per troy ounce). As a matter of fact, there have been considerable increases inside the costs of precious metals at the turn of the Twenty-First century. This has encouraged many enterprises to go into precious metal recycling.
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