Coins from precious metals
Precious metal - a rare, natural metal chemical element of high economic value. Chemically, precious metals are less active, than the majority of elements, have high gloss, are softer or more pliable, and have higher fusion points, than other metals. Historically, precious metals were important as currency, but now are considered mainly as investment and manufactured goods.
The Most known precious metals used for coinage - gold and silver. Though both have industrial use, is better they are presented in art, jewelry and stamping. Other precious metals switch on platinum metals: ruthenium, rhodium, a palladium, osmium, iridium, and platinum from which platinum is the most widespread.
Demand for precious metals stimulates not only their practical use, but also a role as investments and savings. Has historically developed that precious metals were sold on ready more to heavy prices, than usual industrial metals.
Many countries mint investment coins. And though nominally they are manufactured as a lawful instrument of payment, their present cost much above, it proceeds from value of the precious metal. For example, Canada manufactures a coined gold (the Gold Maple leaf) for a face-value 50$, it contains one ounce (31.1035 gold - for May 2011, this coin costs 1 500 Canadian dollars as an ingot. Stamping of investment coins by the national governments yields them some numismatical value in addition to their investment value, just as the certificate of their cleanliness.
One of the greatest investment coins in the world - the Australian coin the Gold Nugget for 10 000 dollars, consisting of one kg of pure gold. The small amount of large investment coins as they are impractical in circulation is manufactured. China manufactured the coins exceeding 260 troy ounces (8 kg) gold, in very limited quantities (less than 20 pieces). In Austria the coin containing 31 kg of gold (the Coin of the Viennese Philharmonic society) by a face-value 100 000 euros has been manufactured. In 2007 the Canadian Royal mint has produced 100 kg a coined gold , a face-value 1 million dollars, and manufactures them now to order, but for essential compensation on a gold market value.