If you are buying gold, understanding the difference between 24k, 22k, and 18k is critical. These numbers tell you exactly how much gold you are getting, which directly impacts value, pricing, and long-term liquidity.
Here is a clear breakdown of gold purity and what it means for buyers.
Karat measures gold purity on a scale of 24.
24k = 99.9% pure gold
22k = 91.7% gold
18k = 75% gold
14k = 58.3% gold
For investment, 24k and 22k dominate. These are the standard across gold bullion products worldwide.
Gold purity is divided into 24 parts.
24k means all 24 parts are gold
22k means 22 parts gold and 2 parts other metals
18k means 18 parts gold and 6 parts other metals
Those added metals increase durability, but they reduce total gold content. You may also see fineness markings like 999, 917, or 750. These represent the same purity in decimal form.
24k gold is the global standard for bullion. Most products are .9999 fine.
This includes:
With 24k, the value is almost entirely tied to gold content. It is the most direct way to own gold.
Tradeoff: it is softer. For long-term holding, this is not a concern.
22k gold is 91.7% pure with a small alloy added for strength.
This is used in:
Key point: a 1 oz 22k coin still contains one full ounce of gold. The added metals increase durability without reducing gold weight.
These coins are among the most recognized and liquid gold products in the world.
Important detail: the American Gold Eagle is the only 22k gold coin approved for gold IRAs. Most other IRA-eligible gold must meet the .9999 standard.
18k and 14k gold contain less gold per piece.
18k = 75% gold
14k = 58.3% gold
These are not typical bullion products. The lower gold content makes them less efficient for holding gold value over time.
Gold pricing follows purity.
Higher karat means:
Lower karat means:
Common stamps include:
24K, 22K, 18K, 14K
999, 917, 750, 585
Watch for:
GF, GP, GE
These indicate layered gold, not solid gold.
If your goal is to hold gold:
Both are widely traded and easy to sell in active markets.
Karat defines how much gold you actually own. 24k and 22k are the standard for bullion. They provide high gold content, strong recognition, and reliable liquidity across global markets. Anything below that contains significantly less gold and is not designed for efficient gold ownership.
Browse Monument Metals’ selection of gold bars and coins with clearly listed purity, weight, and competitive pricing.
What is the best karat gold for investing?
24k and 22k are the best options. They offer high gold content, strong liquidity, and pricing closely tied to the gold market.
Is 22k or 24k gold better?
Both are effective. 24k offers maximum purity. 22k offers added durability with the same gold weight in coins like the American Gold Eagle.
Why is the American Gold Eagle 22k?
The small amount of added metal makes the coin more durable while still containing a full ounce of gold. It was designed for long-term handling and recognition.
Does lower karat gold hold value?
It holds value based on its gold content, but it contains less gold per piece. That makes it less efficient for investment compared to 22k or 24k bullion.