Gold Bars 101: Understanding Purity, Weight & Authenticity
At Beaverton Coin & Currency in Portland, OR, we know that purchasing gold bars can feel overwhelming, especially for first-time buyers. That’s why we’re here to simplify the process. Whether you’re looking for a store of value or diversifying your tangible assets, our team helps you navigate the market with clarity. We carry a wide selection of bars of gold, each carefully sourced to ensure purity and authenticity. Let us show you what makes a gold bar valuable and how you can make a confident purchase.
What Are Gold Bars and Why Do They Matter?
Gold bars, also referred to as bullion bars, are rectangular pieces of refined gold manufactured primarily for the purpose of preserving wealth. These bars are produced in various sizes and weights by private mints and government refineries around the world. While coins often carry a collectible premium, gold bars typically offer a more cost-efficient way to own physical gold due to their lower fabrication costs.
At Beaverton Coin & Currency, we stock a range of bars of gold suited to different buyer needs—from compact 1 oz bars to substantial 1 kg blocks. Each gold bar is stamped with critical information like weight and purity, helping ensure the transparency and security of your investment.
Understanding Gold Purity: .999 vs. .9999 Fine
One of the first things you’ll notice when examining a gold bar is its purity, often marked as ".999" or ".9999 fine." These numbers represent how much of the bar is pure gold:
- .999 Fine Gold: This means the bar is 99.9% pure gold, with only 0.1% composed of other metals. It’s considered investment-grade and widely accepted.
- .9999 Fine Gold: Also known as "four nines" fine, this is 99.99% pure and represents the highest level of purity commonly available in gold bars.
The difference might seem small, but in the world of precious metals, even a slight variation can influence a bar’s desirability and value. All the gold bars available at our Portland, OR, location meet or exceed these purity standards, ensuring that you receive genuine bullion with every purchase.
Common Weight Denominations for Gold Bars
The weight of a gold bar plays a big role in how it is priced, traded, and stored. At Beaverton Coin & Currency, we offer bars of gold in a variety of standardized weights, including
- 1 gram
- 5 grams
- 10 grams
- 1 ounce (oz)
- 100 grams
- 10 ounces (oz)
- 1 kilogram (kg)
Among these, the 1 oz gold bar remains the most popular choice for both new and experienced buyers due to its balance of affordability and value retention. For those looking for larger allocations, the 1 kg gold bar (approximately 32.15 troy ounces) is favored for its lower cost per ounce.
These weights follow international standards, making it easier to compare and trade gold bars globally. When selecting a gold bar, buyers often consider their storage capabilities and how easily they might liquidate the bar in the future.
How to Identify Authentic Gold Bars
Not all bars of gold are created equal, and authenticity is critical. Here's what to look for when evaluating a gold bar:
- Refiner’s Name or Logo: Reputable refiners like PAMP Suisse, Valcambi, and the Royal Canadian Mint mark each bar with their official stamp.
- Weight and Purity Markings: These are usually engraved or printed directly on the surface of the bar.
- Serial Number: High-quality gold bars often include a unique serial number for added security and traceability.
- Assay Certificate: Many bars come sealed with an assay card that confirms the bar’s specifications, adding another layer of confidence.
At Beaverton Coin & Currency, every gold bar we sell is inspected and verified. We only source from trusted mints and suppliers, ensuring that our clients receive authentic bullion that meets the highest standards.
Storage and Security Tips for Gold Bar Owners
After purchasing gold bars, secure storage becomes your next consideration. Here are some popular options:
- Home Safes: A heavy-duty safe provides accessibility but requires careful concealment and security.
- Bank Safety Deposit Boxes: Offers secure off-site storage but limits access to banking hours.
- Private Vault Services: Ideal for large holdings, these services specialize in bullion security and insurance.
We encourage clients to evaluate their personal risk tolerance and storage goals. While we do not provide investment or legal advice, we’re happy to help you understand your options so you can make an informed decision.

Why Gold Bars Are Valued as a Store of Wealth
Historically, bars of gold have been viewed as a reliable store of value. Their tangible nature appeals to those seeking to preserve their purchasing power over time. Because gold is not tied to a specific currency, it offers a level of independence that’s unique among tangible assets.
That said, Beaverton Coin & Currency does not offer investment advice or make predictions about market trends. Instead, our focus is on educating our clients about the gold market and providing access to high-quality gold bars they can trust.
Visit us to explore Gold Bars in Portland, OR
If you’re ready to explore the world of gold bars, our team at Beaverton Coin & Currency is here to assist you. Visit our gold bars page to view our current selection, or stop by our Portland, OR, location for a personalized consultation. With decades of experience and a commitment to authenticity, we’re proud to help you make informed choices about your bars of gold. Contact us today at (503) 640-4700 or send us a message.