Once you've chosen the diamond, the next decision is the metal setting. 18K white gold and platinum PT950 are the two most common white metals for engagement rings. They look similar, but differ in composition, durability and care. This guide helps you understand the differences and choose the right setting.
What is 18K white gold
18K white gold is 75% gold, mixed with other white metals (such as palladium and silver), and usually plated with a layer of rhodium for a whiter, brighter surface. It's light, relatively accessible, and a very popular setting choice.
- Pros: lighter, relatively accessible, bright lustre.
- Note: the rhodium plating wears over time and needs periodic re-plating to stay bright white.
What is platinum PT950
Platinum PT950 is 95% pure platinum, a naturally white metal that needs no rhodium plating. It's dense and heavier, durable and hypoallergenic — the choice for those who want permanence and substance.
- Pros: naturally white (won't fade), durable, hypoallergenic, substantial weight.
- Note: its density makes it heavier and usually pricier than 18K; daily wear develops a soft matte patina that can be polished back.
18K white gold vs platinum PT950
- Composition: 18K = 75% gold + alloy + rhodium plating; PT950 = 95% pure platinum.
- Colour retention: 18K needs periodic re-plating; PT950 is naturally white, no re-plating.
- Weight: PT950 is heavier and substantial; 18K is lighter.
- Allergies: PT950 is hypoallergenic, good for sensitive skin.
- Care: both need regular cleaning; 18K also needs re-plating, PT950 the occasional polish.
How to choose
- Want substance and permanence, or have sensitive skin → platinum PT950.
- Prefer lighter, with budget flexibility → 18K white gold.
- Planning to stack a wedding band → match metals across the engagement ring and band for harmonious stacking and consistent care.
Roselle Jewelry's engagement rings offer 18K white gold, platinum PT950 and more, with full custom design. Visit our Tsim Sha Tsui and Causeway Bay boutiques to feel the difference for yourself.
Frequently asked questions
Is 18K white gold or platinum better?
Neither is universally better — it depends on your needs. Platinum PT950 is naturally white, durable, hypoallergenic and substantial; 18K white gold is lighter and relatively more accessible. Choose platinum for sensitive skin or permanence, 18K for lightness or budget flexibility.
Does 18K white gold turn yellow?
Its rhodium plating wears over time and can reveal a warmer underlying tone; periodic re-plating restores the bright white.
Why is platinum more expensive?
Platinum PT950 is 95% pure platinum — dense, heavy and rarer — so it usually costs more than 18K white gold.
Which metal suits sensitive skin?
Platinum PT950 is hypoallergenic, an ideal choice for sensitive skin.
