What is 22K gold?
22 karat gold contains 22 parts gold and 2 parts other metals (usually copper and silver), making it about 91.6% pure — which is why it is hallmarked 916. The small amount of alloy makes 22K noticeably harder and more durable than pure 24K gold, while retaining a rich gold colour. That balance of durability and gold content makes 22K the standard for traditional jewellery across much of Asia and the Middle East.
In the UK, everyday jewellery is most commonly 9K (375) or 18K (750) rather than 22K, and every piece above a minimal weight must carry a legal hallmark struck by an assay office such as London or Birmingham. 22K and 24K pieces are mostly limited to bullion-style jewellery and coins.