Which white metal is best for your engagement ring? An honest, expert comparison covering durability, price, maintenance, and long-term value.
Both platinum and white gold look virtually identical when new. The real differences are beneath the surface: durability, maintenance, weight, and long-term cost.
A naturally white, dense precious metal. Jewellery-grade platinum is 95% pure (stamped 950). It is rarer than gold — approximately 30 times rarer — and has been prized for fine jewellery since the early 20th century. Platinum does not tarnish, fade, or change colour over time.
An alloy of 75% pure gold mixed with white metals (typically palladium, silver, or nickel). The natural colour of white gold is slightly grey-yellow, so it is coated with rhodium plating to achieve a bright white finish. This plating needs periodic renewal as it wears.
| Platinum | 18ct White Gold | |
|---|---|---|
| Purity | 95% pure platinum (950 hallmark) | 75% pure gold alloyed with white metals (750 / 18ct hallmark) |
| Natural Colour | Naturally white-grey — never changes | Slightly yellow-grey — rhodium plated to appear bright white |
| Durability | Extremely durable — metal displaces rather than wears away | Very durable — slightly harder than platinum but wears down over time |
| Weight | Heavier — you feel the substance on your finger | Lighter — more comfortable for those who prefer less weight |
| Hypoallergenic | Yes — 95% pure, excellent for sensitive skin | Usually — but nickel alloys can cause reactions in some people |
| Maintenance | Develops a patina (matte finish) — polish to restore shine | Needs rhodium re-plating every 12-24 months (£30-50 per service) |
| Price (ring setting) | £100 – £300 more than 18ct white gold | Base price — the more affordable option |
| Scratch Resistance | Scratches show as a "patina" — no metal is lost | Scratches remove material — metal gradually thins over decades |
| Long-term Cost | Lower — no re-plating needed, retains mass | Higher over 10+ years due to periodic rhodium plating |
| Best For | Daily-wear rings, sensitive skin, those who value longevity | Budget-conscious buyers, lighter rings, those who prefer bright white |
This is the most important practical difference between the two metals. White gold's bright white appearance comes from a thin layer of rhodium — a platinum-group metal — electroplated onto the surface. This layer gradually wears away with daily use, revealing the slightly warmer natural colour of the gold alloy beneath.
Re-plating is a quick, affordable process (£30-50, same-day at most jewellers), but it is an ongoing commitment. Most people re-plate every 12-24 months. Over 10 years, that adds up to £150-£500 in maintenance. Platinum, by contrast, is naturally white and never needs re-plating.
For engagement rings worn every day, we lean toward platinum. The extra £100-£300 upfront eliminates maintenance costs, provides better durability, and ensures the ring looks as beautiful in 30 years as it does on day one.
That said, 18ct white gold is an excellent choice if you prefer a lighter ring, have a firm budget, or plan to pair it with existing white gold jewellery. Both metals will hold a diamond beautifully — the difference is in the details, not the overall appearance.
At MOH London, every ring setting is available in both platinum and 18ct white gold (as well as yellow gold and rose gold). You can compare prices directly in our ring builder before deciding.
Yellow gold (classic warm tone) and rose gold (pink-copper hue) are increasingly popular alternatives. Neither requires rhodium plating — their colour is natural and permanent. An added benefit: warm-toned metals complement warmer diamond colour grades (I-K), allowing you to save on the diamond without any visible compromise. For a comprehensive comparison of all four metals, see our complete metals guide.
Platinum is more durable long-term, hypoallergenic, and requires less maintenance — but it costs more upfront and is heavier. White gold is lighter, more affordable, and appears identically white when freshly rhodium-plated. "Better" depends on your priorities: if durability and low maintenance matter most, platinum wins. If budget and weight matter, white gold is the pragmatic choice.
18ct white gold is 75% gold — gold is naturally yellow. To achieve a bright white appearance, white gold is plated with rhodium, a platinum-group metal. This plating wears off over time (typically 12-24 months depending on wear), revealing a slightly warm undertone. Re-plating is quick (same-day service) and costs £30-50. Platinum does not need plating because it is naturally white.
Platinum does scratch — all metals do. However, when platinum scratches, the metal is displaced rather than lost. The scratch creates a ridge of displaced metal alongside the groove. Over time, these micro-scratches create a "patina" — a soft, matte finish that many people find beautiful and characterful. A jeweller can polish platinum to restore its original mirror finish at any time, without losing any metal weight.
For an engagement ring setting, platinum typically adds £100-£300 to the price compared to 18ct white gold. This is a one-time premium that eliminates the ongoing cost of rhodium re-plating (£30-50 every 1-2 years). Over a 10-year period, the total cost of ownership is often comparable — or even lower for platinum.
When white gold is freshly rhodium-plated, it is virtually indistinguishable from platinum in appearance. As the plating wears, white gold develops a slightly warmer tone compared to platinum's cooler grey-white. Weight is the most noticeable difference — platinum rings feel noticeably heavier in the hand. Hallmarks also differ: platinum is stamped 950, while 18ct white gold is stamped 750.
Platinum has the edge for daily wear. It is more durable long-term (metal displaces rather than wearing away), hypoallergenic, and requires no re-plating. The extra £100-£300 upfront is easily offset by zero maintenance costs. If budget is a firm constraint, white gold is still an excellent choice — just factor in the periodic re-plating.
Compare Metals in Our Ring Builder
See the price difference between platinum and white gold on any ring setting — switch metals with one click.