What Does PD500 Mean on Jewelry?
PD500 on jewelry means the piece is 50% palladium, a precious platinum-group metal. Palladium is marked by fineness — Pd500, Pd950, and Pd999 are the recognized standards — and 500 is the lowest of them. The piece is a genuine palladium alloy, lighter and usually less costly than platinum.
The Full Explanation
Pd is the chemical symbol for palladium, and 500 states fineness in parts per thousand: a PD500 piece is 50% palladium by weight, alloyed with other metals for the balance. Palladium belongs to the platinum group of metals and shares platinum's naturally white color and tarnish resistance, which is why it is marketed as a lighter alternative for rings and wedding bands.
The 500, 950, and 999 standards are formally recognized in the UK, which added palladium to its hallmarking system with compulsory marking from January 2010 — the first new metal added to British hallmarking since platinum in 1975. Pd950 is the usual jewelry standard; Pd500 is a lower-cost grade containing half palladium. Elsewhere, marking conventions vary, and some palladium pieces are stamped simply PD or PALLADIUM.
The practical differences from platinum come down to density and price. Palladium's density is about 12 g/cm³ against platinum's 21.45, so a palladium band feels roughly half the weight of an identical platinum one — a genuine advantage for wide rings. Palladium enjoyed a surge in wedding-band use in the 2000s when it was far cheaper than platinum; its market price has since been volatile, driven mainly by automotive catalyst demand, and has at times exceeded both platinum and gold.
For owners, a PD500 piece is real precious metal but the least pure palladium grade. Value depends on weight, the current palladium price, and workmanship; fewer refiners handle palladium than gold, which can affect resale convenience.
Where to Look
Check the inside of ring bands, clasp tags on chains and bracelets, and the backs of pendants. The mark may read PD500, Pd500, or 500Pd, and UK pieces assayed since 2010 also carry a palladium hallmark with the fineness number in three conjoined ovals. Because palladium looks like platinum and white gold, the stamp is often the only quick way to tell the metals apart at home.
Quick Tips
- 1PD500 is half palladium by weight; Pd950 is the higher, more common jewelry standard
- 2Palladium is about half the density of platinum, so palladium rings feel notably light for their size
- 3Palladium is naturally white and does not need rhodium plating, unlike white gold
- 4UK pieces made since 2010 should carry an official palladium hallmark alongside any PD stamp
- 5Palladium prices are volatile, so resale value can swing more than gold or platinum
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Frequently asked questions
Is PD500 real palladium?
Yes. PD500 indicates a genuine alloy containing 50% palladium, a precious platinum-group metal. It is the lowest recognized palladium standard, below Pd950 and Pd999, so the piece contains real precious metal but at half the concentration of standard palladium jewelry.
Is palladium worth more than platinum?
It changes with the market. Palladium was historically the cheaper metal, but heavy industrial demand — chiefly for car exhaust catalysts — pushed its price above platinum for stretches after 2018. For a specific piece, weight, fineness, and craftsmanship matter as much as the day's spot price.
Is palladium good for wedding bands?
Yes, particularly for wearers who want a white, tarnish-free, hypoallergenic metal without platinum's weight or historical price. Pd950 is the usual choice for bands. The main drawbacks are that fewer jewelers stock and resize palladium, and its resale market is thinner than gold's.
How can I tell palladium from white gold or platinum?
The stamp is the quickest guide: PD or Pd marks palladium, PT or PLAT marks platinum, and karat marks like 14K or 750 indicate white gold. Weight helps too — platinum feels distinctly heavy, palladium light. For an unmarked piece, a jeweler's assay or XRF test gives a definitive answer.
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