Bars :
The most traditional way of investing in gold is by buying bullion gold bars. In some countries, like Argentina, Austria, Liechtenstein and Switzerland, these can easily be bought or sold at the major banks. Alternatively, there are bullion dealers that provide the same service. Bars are available in various sizes. For example in Europe, Good Delivery bars are approximately 400 troy ounces (12 kg). 1 kilogram (32 ozt) are also popular, although many other weights exist, such as the 10oz, 1oz, 10 g, 100 g, 1 kg, 1 Tael, and 1 Tola.
Bars generally carry lower price premiums than gold bullion coins. However larger bars carry an increased risk of forgery due to their less stringent parameters for appearance. While bullion coins can be easily weighed and measured against known values, most bars cannot, and gold buyers often have bars re-assayed. Larger bars also have a greater volume in which to create a partial forgery using a tungsten-filled cavity, which may not be revealed by an assay.
Efforts to combat gold bar counterfeiting include kinebars which employ a unique holographic technology and are manufactured by the Argor-Heraeus refinery in Switzerland.
Coins:
Gold coins are a common way of owning gold. Bullion coins are priced according to their fine weight, plus a small premium based on supply and demand (as opposed to numismatic gold coins which are priced mainly by supply and demand).
The Krugerrand is the most widely-held gold bullion coin, with 46,000,000 troy ounces (1,400 tonnes) in circulation. Other common gold bullion coins include the Australian Gold Nugget (Kangaroo), Austrian Philharmoniker (Philharmonic), Austrian 100 Corona, Canadian Gold Maple Leaf, Chinese Gold Panda, French Coq d’Or (Golden Rooster), Mexican Gold 50 Peso, British Sovereign, and American Gold Eagle.
Coins may be purchased from a variety of dealers both large and small. Fake gold coins are not uncommon, and are usually made of gold-plated lead.
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