950 Platinum in jewelry
Why choose platinum for your wedding and engagement rings?
950‰ platinum (95% platinum, 5% iridium or ruthenium) is the standard high-jewelry alloy worldwide. The '950 PT' or '950 Plat' hallmark is internationally recognized.
Value Calculation: At the spot price of CHF 31.20/g, a 950 platinum wedding ring weighing 8g is worth in metal: 8 × 0.950 × 31.20 = CHF 236.88. Craftsmanship, labor, and the jeweler's margin typically bring the final retail price to CHF 800–2,000 depending on complexity.
Distinctive Properties: 950 platinum is 60% denser than 18k gold. This density gives it a characteristic weight (connoisseurs recognize a platinum ring by hand). Its Vickers hardness (430 HV) is superior to 18k gold (~200 HV) — fewer scratches, better setting hold.
Wear Behavior: Unlike gold which loses metal through friction, platinum displaces on the surface without loss (micro-plastic deformation). Over time, the surface takes on a natural satin patina (elephant skin) appreciated by connoisseurs. Professional re-polishing restores original shine.
Workshop Work: Welding platinum requires special fillers (1400°C platinum welding wires), oxy-hydrogen or argon torches, and very strict thermal insulation. Unlike gold, platinum does not burn — any overheating produces irreversible surface oxidation.