Sell Platinum Jewellery in London (2026): Pt950 vs Pt900, Hallmarks & Price‑Per‑Gram
Platinum jewellery is often harder for sellers to price confidently than gold jewellery because the marks, purity references, and market pricing feel less familiar. That is especially true if you are comparing Pt950 and Pt900.
This guide explains how platinum jewellery is valued in London, how Pt950 and Pt900 differ, what hallmarks to look for, and why the platinum price per gram matters before you sell.
Quick routes
If you want a live figure or a fast next step while reading, these are the most useful London Gold Centre pages to keep open alongside this article.
Pt950 vs Pt900: what the numbers mean
Pt950 usually indicates 95% platinum purity, while Pt900 usually indicates 90% platinum purity. That means a Pt950 item contains more platinum per gram than a Pt900 item and, all else being equal, can attract a higher value per gram.
In practice, total payout still depends on the live platinum price and the item’s weight. A heavier Pt900 piece may still be worth more overall than a lighter Pt950 piece, which is why both purity and weight matter together.
How hallmarks help
A visible hallmark helps a buyer move more quickly to the right valuation route. If the item carries a clear Pt950 or Pt900 mark, that gives a strong starting point for pricing. If the mark is worn, incomplete, or missing, professional testing may still be needed.
That is not unusual with older jewellery. Reputable buyers explain the process and do not rely only on visual assumptions where the purity needs to be checked.
Why platinum price per gram matters
Like gold, platinum is ultimately valued against the live market. The platinum price per gram can change during the day, which is why sellers often check a live pricing tool before visiting or posting items.
If you want a current benchmark, London Gold Centre’s Platinum Price Calculator is the most practical place to start.
How to improve your sale process
If you have several platinum items, separate them from white gold or silver before asking for a quote. Mention stones, designer brands, or mixed-metal pieces in advance because they may need a more careful route.
Bring any paperwork you still have, but do not assume you need it for the item to be assessed. The main job is to make it easy for the buyer to identify the right platinum route and give you a clear same-day explanation.
Use official sources where the rules matter
For tax, shipping, assay, and refiner standards, always confirm the latest official guidance before making a large decision. These external resources are the most relevant starting points for this topic.
Frequently asked questions
Is Pt950 better than Pt900?
For pure platinum content, yes. Pt950 contains more platinum per gram, although total value still depends on the item’s weight.
Can platinum jewellery be sold without a visible hallmark?
Yes, but it may need testing if the mark is unclear or missing.
Does platinum jewellery follow the same route as gold?
Not always. The market, per-gram rate, and hallmark system are different, so the valuation route is usually specific to platinum.
Should I check the platinum price before selling?
Yes. A live platinum benchmark helps you understand the quote and compare timing more confidently.
Need a live quote or a practical next step?
Use the relevant calculator, visit Hatton Garden, or contact the team if you want help turning this information into a real buying or selling decision.