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What You Should Know About Gold Bars: Types, Weights, and Purity Levels

At first glance, all gold bars might seem the same—shiny, heavy, and valuable. But when you start exploring the world of gold investing, you’ll quickly see that there’s more to these bricks of wealth than just their glitter. From how they’re made to what they weigh and how pure they are, gold bars come with plenty of variety. Knowing the basics can help you make a smarter purchase. Get more info!

Gold bars are generally divided into two main types: cast and minted. Cast bars are made by pouring molten gold into molds and letting them cool. Each one ends up slightly unique, with rough edges and a rustic, no-frills appearance. They’re the old-school, industrial look of gold. Minted bars, on the other hand, are made from rolled sheets of gold. These sheets are cut into precise shapes and then stamped with designs, resulting in sleek, highly polished bars that look like luxury items. If you like perfection, minted bars are likely your style.

When it comes to weight, there’s a size for every budget. The smallest bars start at just one gram, making them great for gifts or first-time buyers. Common weights include 5g, 10g, 20g, 50g, and 100g. For more serious investors, there are larger options—250g, 500g, and the widely recognized 1-kilogram bar. For institutions or very high-net-worth individuals, there are even 400-ounce bars like the ones stored in central bank vaults.

Purity is another important factor. You’ll often see numbers like 999.9 or 995 stamped onto the surface of a bar. These indicate how many parts out of 1,000 are pure gold. A 999.9 fine bar means it’s 99.99% pure gold, which is the industry standard for investment-grade bullion. Lower purities like 916 (91.6%) are more commonly found in gold jewelry rather than in investment bars.

Brand matters too. Bars from trusted refiners like PAMP Suisse, Heraeus, the Perth Mint, and The Royal Mint come with certifications and quality assurance. A typical gold bar will have several markings: the weight, the purity, a unique serial number, and the refinery logo. These details not only guarantee authenticity but also make resale much easier.

In the end, whether you prefer a cast bar’s rugged character or the sleek shine of a minted bar, there’s a gold bar out there that fits your needs. Think about your goals, your budget, and your personal taste. With the right information, buying gold bars can be a solid and satisfying investment decision.