Platinum vs White Gold: the differences
Comparison of density, wear and price between these two white metals.
At a glanceChoosing between a 950 Platinum ring and an 18-karat White Gold ring (750‰) is the quintessential bridal jewelry dilemma in Switzerland. While both metals display a cool, sophisticated silver-white appearance in the showroom, their physical weight, aging behavior, and maintenance costs diverge dramatically. This in-depth comparison guides your investment.
Direct Comparison: Platinum 950 vs Rhodium-Plated White Gold vs Palladium White Gold
| Evaluation Metric | Platinum 950 (Pt950) | 18k Rhodium White Gold | 18k Palladium White Gold |
|---|---|---|---|
| Precious Metal Purity | 95.0% pure platinum | 75.0% fine gold | 75.0% fine gold + 13% palladium |
| Density (Weight on Finger) | 21.45 g/cm³ (Very heavy) | 15.30 g/cm³ | 15.80 g/cm³ |
| Natural Base Color | Pure silvery white | Warm yellowish gray | Natural steel gray |
| Rhodium Plating Required? | No (Never) | Yes (Every 1–2 years) | No (Optional) |
| Aging Appearance | Develops soft satin patina | Yellows at friction points | Retains permanent gray-white |
| Scratch Metal Loss | Zero (Displaced furrow) | Measurable (Micro-chipping) | Measurable (Micro-chipping) |
| Allergy Risk | 0% (100% Hypoallergenic) | Low (unless nickel traces) | 0% (Hypoallergenic) |
| Avg. 4mm Band Price (CHF) | CHF 1,100 – 1,600 | CHF 750 – 1,100 | CHF 950 – 1,350 |
1. Density and Heft: The Platinum Advantage
Platinum is roughly 35% denser than 18k gold. For a classic 4mm men's wedding band (1.8mm thickness):
- Weight in 18k white gold: approx. 5.5 grams.
- Weight in 950 platinum: approx. 7.8 grams.
This noticeable heft provides a feeling of substance and luxury that symbolizes lifelong commitment.
2. Long-Term Maintenance: The Rhodium Factor
- Standard White Gold: Coated in a 0.2-micron galvanic rhodium plating. Daily friction rubs off this coating within 12 to 24 months, revealing the yellowish underlying gold. Re-rhodium plating (costing CHF 50 to 90 in Swiss jewelry shops) is an ongoing necessity.
- Platinum 950: Has no plating. Its color remains identical after 50 years of wear.
3. Scratches: Displacement vs Metal Loss
All noble metals scratch. However:
- On white gold, scratches remove microscopic slivers of metal. Over decades of wear and buffing, the ring shank noticeably thins.
- On platinum, scratches displace metal into adjacent ridges (plastic work-hardening). The metal is merely moved aside—the ring loses virtually zero weight over a lifetime.
The 10-Year Ownership Cost Analysis
Although platinum costs 25% to 35% more initially, it frequently proves more economical over a decade:
- 18k Rhodium White Gold over 10 years: Initial purchase (CHF 850) + 5 re-platings (CHF 350) = CHF 1,200.
- 950 Platinum over 10 years: Initial purchase (CHF 1,250) + CHF 0 mandatory plating = CHF 1,250.
Frequently Asked Questions (FAQ): Platinum vs White Gold
Is platinum more scratch-resistant than gold?
Platinum is tougher and less brittle, but not necessarily harder on the surface than cold-worked white gold. Platinum will develop fine micro-scratches, but without losing metal mass.
Can you wear a platinum wedding band next to a white gold engagement ring?
Not recommended on the same finger: platinum's superior density will gradually grind down the softer white gold shank through daily friction.
Buy Investment Gold in Switzerland (VAT-Exempt)
Buy and store physical gold in secure Zurich or Geneva vaults at direct live LBMA spot rates.