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What is a gold ingot?

A gold ingot, made by pouring molten gold into a mold, differs from smaller bars minted or stamped from gold bullion sheets. These ingots must contain at least 99.5% pure gold and meet specific size and marking standards set by the London Bullion Market Association (LBMA). Furthermore, The precious metals market widely recognizes them as a standard form of investment.

Good Delivery Bars

Good Delivery Bars, a specific type of gold ingot, usually weigh between 350 to 430 troy ounces. This means a 400 oz t ingot contains at least 398 oz t of pure gold.

Additionally, they are large, pure precious metal bars with standard weight and dimensions. Therefore, major international markets use them for physical settlement, and banks use them for reserves.

  • Length (top): 210-290 mm
  • Width (top): 55-85 mm
  • Height: 25-45 mm
  • Weight: 350-430 troy ounces / 11-13 kg
  • Purity: Minimum 99.5% (995.0/1000)
gold ingot

Gold Ingot Contents

An ingot typically includes marks like a serial number, refiner’s hallmark, purity level (99.5% pure gold), and the year of manufacture. 

These markings are essential for identifying and verifying the ingot’s authenticity and quality in the bullion market.


The purity of gold is a crucial determinant of the cost of gold ingots. Ingests with higher purity, such as those containing 999.9 fine gold, command a higher price compared to the minimum 99.5% purity required for standard “Good Delivery” bars. 

This is due to increased production costs and greater desirability, resulting in a higher overall price for investors.

Production Process

Production process of gold ingots involves extracting gold from ore, refining it for purity, melting the gold, pouring it into molds, stamping identifying marks, and conducting quality assurance to meet standards.

Mining and Refining of Gold

Gold is extracted from ore and crushed into sand-sized grains. It’s dissolved using cyanide in a process called leaching, then collected with zinc powder. The gold is further purified to achieve a certain level of purity.

Melting and Pouring into Molds

The purified gold is melted and poured into molds to create ingots. After solidifying, the ingots take on the desired shape and size.

Stamping and Engraving of Identifying Marks

Once solidified, manufacturers stamp and engrave the ingots with key information, such as the fineness of the gold, manufacturer’s mark, serial number, and production year. 

Consequently, these marks are crucial for identifying the origin and purity of the ingots.

Quality Assurance and Testing

After marking, ingots undergo rigorous quality assurance and testing to ensure they meet standards for purity, dimensions, and weight.

Gold Ingot applications

By knowing the various applications of gold ingots, investors and individuals can make informed decisions about the role of these precious metal assets in their portfolios or personal holdings.

Investment and Wealth Preservation

Gold ingots, prized as investments for diversifying portfolios, offering stability during economic uncertainty, and serving as a hedge against inflation, are stored in secure locations such as private vaults or bank safety deposit boxes.

Collateral for Loans

Highly liquid and valuable, gold ingots are accepted as collateral for loans, allowing borrowers to access funds while keeping ownership of the gold.

Industrial and Commercial Applications

Gold ingots are crucial in the electronics, dentistry, and jewelry industries due to their high purity and malleability.

Numismatic and Collector’s Items

Some gold ingots with unique designs or limited editions are highly sought after by collectors, often exceeding their gold value due to rarity.

Gifting and Ceremonial Purposes

They function as prestigious gifts, moreover, they hold ceremonial and religious significance in some cultures.

Gold Ingot History

Gold ingots, or standardized bars of gold, have a long history dating back to ancient civilizations. Moreover, as early societies transitioned from barter to using precious metals as currency, uniform gold bars became a precursor to coins. Also, Egyptians, Greeks, Romans, and Chinese were among the first to recognize gold’s value, using it as a symbol of wealth and power. Furthermore, gold artifacts from these ancient cultures often held deep cultural and religious significance.