A “brick of gold” typically refers to a standard gold bar used in the precious metals industry, and these bars typically weigh around 400 troy ounces (or 12.4 kilograms, or 27.4 pounds) each.

Gold bars are produced by private and government mints around the world and are used as a store of value, a hedge against inflation, and as a tradable asset on commodity exchanges. The standard size and weight of gold bars are determined by the London Bullion Market Association (LBMA), a trade association representing the global over-the-counter (OTC) market for gold and silver bullion.
Gold bars are typically produced in a rectangular shape with sharp edges and are stamped with identifying information such as the weight, purity, and a unique serial number. The LBMA only accredits gold bars produced by approved refiners, which are subject to strict quality control standards to ensure their purity and authenticity.
In addition to the standard 400-ounce gold bar, there are other sizes and shapes of gold bars available, including smaller bars designed for retail investors and larger bars used primarily for storage in central banks and large institutional investors.
It is important to note that the weight of a gold bar can vary slightly due to manufacturing tolerances, but generally, the weight of a standard gold bar is well-established and consistent across the industry. The weight of a gold bar is typically measured in troy ounces, which is a unit of weight used for precious metals that is equivalent to 31.1 grams or 1.097 ounces.
In conclusion, a “brick of gold” typically refers to a standard gold bar used in the precious metals industry, and these bars typically weigh around 400 troy ounces (or 12.4 kilograms, or 27.4 pounds) each. Gold bars are produced by private and government mints around the world and are used as a store of value, a hedge against inflation, and as a tradable asset on commodity exchanges. The standard size and weight of gold bars are determined by the London Bullion Market Association, and while the weight of a gold bar can vary slightly due to manufacturing tolerances, the weight of a standard gold bar is well-established and consistent across the industry.