Gold is one of the most widely recognised precious metals for preserving wealth and diversifying an investment portfolio. However, not all gold products contain the same proportion of pure gold. Understanding gold purity is therefore essential when buying jewellery, coins or investment gold.
Terms such as 24 karat gold, 22K gold and investment-grade gold are often used when discussing gold products, but they represent different levels of purity and different uses.
For investors in South Africa, understanding these distinctions can help when comparing bullion products, assessing prices and choosing physical gold that suits their investment objectives.
What Does Gold Purity Mean?
Gold purity refers to the proportion of pure gold contained in a gold product.
Pure gold is naturally soft, so other metals such as silver, copper or zinc may be added to create stronger alloys. The amount of pure gold is expressed either in karats (K) or fineness.
The karat system uses 24 parts as the whole:
- 24K gold = up to 24 parts gold out of 24
- 22K gold = 22 parts gold out of 24
- 18K gold = 18 parts gold out of 24
- 14K gold = 14 parts gold out of 24
Fineness expresses purity as parts per thousand. For example, gold with a fineness of 999 contains approximately 999 parts pure gold per 1,000.
What Is 24 Karat Gold?
24 karat gold is considered the highest purity commonly associated with the karat system. It contains approximately 99.9% pure gold when described as 999 or 999.9 fineness.
Because of its high purity, 24K gold has a distinctive rich yellow appearance. However, pure gold is relatively soft compared with gold alloys, which is one reason jewellery is often manufactured using lower-karat gold.
For investment purposes, high-purity gold is particularly important because the value of bullion is closely linked to its actual gold content.
What Is 22K Gold?
22K gold contains 22 parts pure gold out of 24. This corresponds to approximately 91.6% gold, with the remaining portion consisting of other metals.
The additional metals make 22K gold harder and more suitable for certain jewellery applications than 24K gold.
22K gold can still contain a substantial amount of gold, but investors should distinguish between the gold content and the product's overall price. Jewellery may include manufacturing costs, design premiums and retail mark-ups that do not directly correspond to the value of its gold content.
24K vs 22K Gold
The main difference between 24K and 22K gold is purity.
| Feature | 24K Gold | 22K Gold |
|---|---|---|
| Gold content | Approximately 99.9% in 999/999.9 products | Approximately 91.6% |
| Purity | Very high | High |
| Durability | Softer | Harder |
| Common uses | Bullion, investment products and some jewellery | Jewellery and selected gold products |
| Investment consideration | High gold content | Lower gold content per gram |
For someone buying physical gold primarily as an investment, it is important to look at the product's exact fineness, weight, premium and liquidity rather than relying only on the karat number.
What Is Investment Gold?
Investment gold generally refers to high-purity gold products purchased primarily for their precious-metal value rather than their decorative or collectible characteristics.
Common forms include:
- Gold bullion bars
- Investment-grade gold coins
- Certain high-purity gold products
- Products from recognised mints and refiners
Investment gold is typically valued according to its gold content, market price, product premium and demand.
This makes it different from jewellery, where the purchase price can also reflect craftsmanship, design, branding and retail costs.
What Is Investment-Grade Gold?
Investment-grade gold generally has a high level of purity and is produced to established bullion standards.
When assessing a bullion product, investors should consider more than purity alone. Important factors include:
1. Purity
The fineness indicates how much of the product is actually gold. Bullion products commonly have very high fineness, such as 999 or 999.9.
2. Weight
Gold is available in different weights, from small bars and coins to larger bullion products. The weight directly affects the quantity of gold you own.
3. Refinery or Mint
The manufacturer can influence recognition and resaleability. Products from established and reputable mints or refiners can be easier for dealers and investors to identify.
4. Premium
The purchase price of physical gold is generally higher than the underlying spot value of its gold content. This difference is the premium.
5. Liquidity
Consider how easily the product can be sold and whether there is established demand for it.
How Is Gold Purity Measured?
There are two common ways of describing gold purity: karats and fineness.
Karat System
The karat system is based on 24 parts:
Purity (%) = Karat ÷ 24 × 100
For example:
22K gold:
22 ÷ 24 × 100 = 91.67%
18K gold:
18 ÷ 24 × 100 = 75%
24K gold represents the highest level on the karat scale.
Fineness System
Fineness uses a scale of 1,000.
For example:
- 999 = 99.9% gold
- 999.9 = 99.99% gold
- 916 = 91.6% gold
- 750 = 75% gold
For bullion investors, fineness can be particularly useful because it provides a precise indication of the gold content.
Why Gold Purity Matters When Investing
When purchasing physical gold, purity directly affects the amount of actual gold contained in the product.
Consider two products with the same gross weight:
- A 100g product with 999 fineness contains approximately 99.9g of gold.
- A 100g product with 916 fineness contains approximately 91.6g of gold.
This difference matters when comparing products and prices.
However, purity should not be considered in isolation. A product with a higher purity may still have a different premium, resale market or storage requirement. Investors should evaluate the total cost and value proposition.
Is 24K Gold Better for Investment?
For many physical gold investors, high-purity gold is attractive because a larger proportion of the product consists of gold.
However, "better" depends on the type of product being purchased.
A 24K bullion coin or bar can be suitable for an investor seeking high-purity physical gold. By contrast, 22K gold jewellery may not be as straightforward an investment because its retail price can include significant costs beyond the value of the gold itself.
If your primary objective is investment rather than wearing the gold, comparing dedicated bullion products can make the decision easier.
Investment Gold vs Gold Jewellery
One of the most important distinctions for new gold buyers is the difference between bullion and jewellery.
Investment gold is generally purchased for its precious-metal value, whereas jewellery is purchased for a combination of gold content, craftsmanship, design and personal use.
| Factor | Investment Gold | Gold Jewellery |
|---|---|---|
| Main purpose | Wealth/investment | Personal use and adornment |
| Purity | Usually very high | Varies |
| Pricing | Closely related to gold value + premium | Gold value + making/design/retail costs |
| Resale | Primarily based on bullion value and market demand | Can involve deductions and other considerations |
| Form | Bars and bullion coins | Rings, necklaces, bracelets, etc. |
This distinction is important when evaluating whether a gold purchase is intended primarily as an investment.
How to Check Gold Purity Before Buying
Before purchasing physical gold, check the product specifications carefully.
Look for:
- Stated purity or fineness
- Gross weight
- Fine gold content
- Manufacturer or refiner
- Product markings
- Relevant certification or documentation
- Purchase price
- Applicable premium
- Dealer buy-back terms
Buying from an established bullion dealer can also help ensure that the product's specifications and provenance are clearly documented.
Choosing the Right Gold Purity for Your Investment
There is no single gold product that is suitable for every investor.
If your objective is to hold physical gold as a long-term store of value, high-purity bullion may be worth considering. If you are buying gold jewellery, 22K or other alloys may provide a practical balance between gold content and durability.
Before making a purchase, consider:
Your budget + desired gold weight + purity + premium + liquidity + storage
Taking these factors together can provide a more meaningful comparison than focusing on karat alone.
Buy Investment Gold in South Africa
Understanding gold purity is an important first step when purchasing physical precious metals. Whether you are comparing 24 karat gold, bullion bars or investment-grade coins, always verify the purity, weight, premium and product specifications.
IBV Gold offers precious-metal products for investors looking to buy physical gold in South Africa.
Explore the available options and compare products based on purity, gold content and your individual investment objectives.
Frequently Asked Questions
Is 24K gold the same as pure gold?
24K is the highest karat designation and represents gold with very high purity. Bullion may be specified more precisely using fineness, such as 999 or 999.9.
Is 22K gold good for investment?
22K gold contains approximately 91.6% gold. It can have value as a gold holding, but investors should consider the product format, premium, resaleability and additional costs.
What is investment-grade gold?
Investment-grade gold generally refers to high-purity gold products intended primarily for investment, such as bullion bars and recognised bullion coins.
What does 999 gold mean?
999 gold has a fineness of 999 parts per 1,000, meaning it contains approximately 99.9% gold.
Is higher gold purity always better?
Not necessarily. Higher purity means a greater proportion of the product is gold, but investors should also consider price, premium, liquidity, storage and the intended use of the product.
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