A gold bar is generally defined as any gold item, regardless of shape, which means it does not even have to be in the shape of a bar, and which is made by a bar manufacturer, records the name of the manufacturer, the precise weight and the precise purity, and is sold at a low premium above the gold price. There are bars made by most countries in the world today. Most countries make, or have made gold bars of one sort of another. Also many shapes, not just the bar like shapes.
Here is a list of some of the gold bars available world wide.
'400' oz ('12.5' kg) bar
Gold Leaf' Bars
Fine Gold Cards
'Gold Fillet' Bars
'Double Pendant' Bars
'Bullion Watch' Bars
'Fine Art' Bars
'Cartoon' Bars 'Minted 'Brick' Bars
The world's largest - and smallest - bars
Historical Rothschild Bars
Oldest Assay Mark
A description of the gold bars in this list can be found at: Gold Bars
Collecting gold bars is generally done more for investment purposes as distinct from gold coin collectors who may also collect for the aesthetic appeal of the coins.
Collecting gold bars does have an appeal however. Some can look quite striking and the cost ratio to the value of gold the bar contains is usually, for the most part, better than the purchase of gold coins.
There are no proof or uncirculated considerations to take into account and gold bars are transportable and saleable anywhere in the world.
Collecting gold bars, as well as an excellent possible investment for the future can also be fun and provide much interest to the collector.