What is yellow gold?
By Jared James · Last updated 21 May 2026
Definition
Yellow gold is gold in its classic warm form, alloyed with copper and silver to achieve workable hardness while keeping the rich colour most people picture when they think of gold. Pure gold is too soft to wear, so virtually all yellow gold jewellery is an alloy: 9ct contains 37.5% gold, 18ct contains 75%, and the higher the carat the deeper and warmer the tone. Yellow gold suits warm and olive skin tones particularly well and has seen a strong revival in fine jewellery over the past decade.
Frequently asked questions
- Does yellow gold tarnish or fade?
- Pure gold does not tarnish at all, and the higher the carat the more tarnish-resistant a piece will be. Lower-carat gold like 9ct carries more alloy metal which can dull slightly over time, particularly around chemicals and sweat, but a gentle polish or clean brings it back easily.
- Is yellow gold coming back into fashion?
- Yes, after several decades when white gold and platinum dominated engagement rings and fine jewellery, yellow gold has been strongly back in style since around 2015. Contemporary jewellers have embraced it, and its warm tone pairs well with both classic and unconventional stone shapes.
- What is the difference between 9ct and 18ct yellow gold?
- 9ct yellow gold is 37.5% pure gold and is harder, more affordable and slightly paler in colour, while 18ct is 75% pure gold with a deeper, richer tone and a softer feel. In Australia, 9ct is the minimum standard for gold jewellery and is widely used for everyday pieces.
Designing a ring
Talk through yellow gold with us
Tell us what you have in mind, even if it is only a budget and a piece of jewellery type, and we will help you weigh up the options. We reply to every enquiry, usually within one business day.
Contact the studio