Gold bullion is a term used to describe any form of pure gold that's not fabricated into coins or jewelry. The term "gold bullion" is synonymous with a few other phrases, such as "gold bars" and "investment gold". The words "gold ingots" and "gold bricks" can also be used to describe gold in its purest form. Some might use the term "gold bullion coins" when referring to gold coins specifically minted for investment purposes instead of being meant for general circulation. These synonyms all describe pure gold in a solid form and are often used interchangeably. Investors can buy gold bullion in any of these forms, depending on their preference.