Why You Shouldn’t Mix Different Metal Karats or Metal Types
When it comes to co-creating heirloom jewellery, choosing the right precious metal isn’t just about colour and style, it’s about how metals wear and interact with one another over time. Your jewellery is crafted to last a lifetime, so it’s important to understand how different metals behave next to each other, especially when you’re wearing pieces together every day.
Your Guide To Karats
Pure Gold comprises of 24 karats, which is far too soft to utilise in bridal jewellery, so it is alloyed with other metals to provide strength and durability, as well as to achieve varying colour hues.
14 karat yellow gold is made up of 58.5% pure gold, and 41.5% alloy. It is a beautiful yellow gold option with a soft, golden hue.
18 karat yellow gold is made up of 75% pure gold and 25% alloy. 18 Karat comprises of more pure gold than 14k karat, has a richer golden hue, and is slightly more malleable.
Styling Gold
When jewellery pieces of different gold karats are worn together, for example, stacked rings or layered bracelets and necklaces, the harder, more alloyed metals (such a 9 Karat, or 14 Karat) will rub against the softer, purer gold (such as 18 Karat). Over time, this repeated contact can lead to visible wear and thinning of the higher karat piece, which isn’t crafted to endure constant friction from harder metals.
In practical terms: Harder metals can wear away softer ones. This isn’t just about scratches and dents, it’s about long-term material loss.
Platinum vs Gold
Platinum is a beautiful, premium metal often chosen for its weight, colour and minimal upkeep. At TMC Fine Jewellers, our platinum is very pure, comprising of 95% pure platinum and 5% alloy, meaning it is also a much harder and denser metal compared to its gold counterparts.
When platinum and gold sit side by side, particularly in rings that rub together, a platinum ring will barely lose any of its metal thickness over time, but the softer metals will gradually lose material. This is because each precious metal behaves differently due to its composition, and platinum’s strength means it doesn’t “give” like softer metals.
Conscious Styling
While each piece is meticulously crafted to journey with you, mixing metal types can compromise its structural integrity. It’s easy to overlook how everyday movement impacts your jewellery, yet these subtle moments are often where it matters most. Below are just a few examples of where you should not mix metals:
- Rings stacked, or on adjacent fingers constantly brush against one another.
- Multiple bracelets shifting on your wrist throughout the day.
- Pendants and chains styled together.
Over time, these interactions can lead to visible wear in softer metals, thinning bands and weakening settings that may eventually require professional repair.
Your Care Guide
To protect the longevity of your pieces:
- Remain with one metal type and karat when stacking or layering. This reduces friction between metals that wear differently.
- If you love mixed-metal looks, choose designs that are intentionally made that way, metals fused by design, such as a two-tone setting, won’t wear each other down the same way.
- Separate metals when storing jewellery to prevent contact damage when they’re not being worn.
More more information on how to care for your ring, discover our detailed care guide here. Or, discover our Signature Range and bring your dream piece to life.
