9k, 14k, 18k: Understanding Gold Purity

Pure gold is too soft to hold a stone or survive daily wear, so it is alloyed with other metals for strength. The karat number simply tells you how much of the final metal is gold: 18k is 75% pure, 14k around 58%, and 9k just under 38%.

That ratio shapes everything. Higher purity yields a richer, warmer colour and superior resistance to tarnish, while lower purity buys hardness and a lower price at the cost of that signature glow.

We settled on 18k as the point where beauty and durability meet most gracefully — rich enough in colour to feel unmistakably precious, yet robust enough to be worn for a lifetime.

Whatever you choose, insist on a hallmark. Every Aurelia piece is stamped and accompanied by documentation so you always know exactly what you are wearing.