18K, 21K, 22K and 24K gold compared
Last updated: 17 October 2026
Karat tells you how much of a piece is pure gold. This article compares the four karats you will meet most often and explains how to choose.
Karat in one line
Pure gold is 24 karat. A karat number is the number of parts of gold out of 24, so 18K is 18 parts gold and 6 parts other metals.
The four karats side by side
Higher karat means richer colour and softer metal. Lower karat means a harder metal that holds its shape better and is usually chosen for pieces worn every day.
| Karat | Purity (gold content) | Character |
|---|---|---|
| 24K | 99.9% | Softest; pure gold |
| 22K | 91.6% | Rich colour; softer |
| 21K | 87.5% | Common for gold jewellery in the region |
| 18K | 75.0% | Harder; suits daily wear and gemstones |
| 14K | 58.5% | Hardest of these; most durable |
Choosing for how you will wear it
For rings and bracelets worn daily, a lower karat resists knocks and bending better. For chains and pendants, a higher karat gives a deeper yellow. For a gift worn on special occasions, the colour you prefer matters most.
Ask the team which karat each piece in our catalogue is made in, because the details are confirmed piece by piece.
Check the stamp and the paperwork
Look for the karat stamp on the piece and ask for the purity to be written on the invoice. For gold bars, scan the QR code to check the registered purity.
Quick answers
What is the difference between 21K and 22K gold?
22K is about 91.6% pure gold and 21K is 87.5%. 22K has a richer colour and is softer; 21K is a little harder.
Is 24K gold good for rings?
24K is the softest karat, so it scratches and bends more easily. Lower karats are usually chosen for rings worn daily.
What percentage of gold is in 18K?
18K is 75% pure gold and 25% other metals.