Is yellow gold real gold? Yes, and this is one of the most common questions people ask when they’re trying to buy solid gold with confidence. The world of karats can feel like a minefield, and not everything that glitters is genuinely gold all the way through.
In this guide, we’ll break down what yellow gold is made of, what 9ct / 14ct / 18ct stamps actually mean, how UK hallmarking protects you, and the quickest ways to spot plated “lookalikes” in the wild.
Image source- Argent & Asher
Key Takeaways
- Yellow gold jewellery is real gold, usually an alloy (not pure) so it’s wearable day-to-day.
- Karats tell you the gold percentage: 9ct (37.5%), 14ct (58.5%), 18ct (75%).
- UK hallmarks are your strongest authenticity signal when buying gold in Britain.
- Plated jewellery is a thin layer of gold over another metal, it looks similar at first, but wears differently.
- Care is simple: mild soap, warm water, soft cloth, plus sensible storage.
Is Yellow Gold Real Gold or an Alloy?
Yes, yellow gold is real gold, but in most jewellery it’s an alloy rather than pure gold. Unless you’re buying bullion, pure gold is typically too soft for jewellery. By blending gold with other metals (commonly copper and silver), jewellers make it stronger and more practical to wear.
Think of karats as a sliding scale of gold content:
- 18ct: premium gold content with a richer feel and colour.
- 14ct: a strong balance of durability and gold richness.
- 9ct: the most accessible entry point while still containing genuine gold.
The added metals don’t make it “less real”, they make it workable as jewellery. What matters is the gold content and whether it’s verified.
Image source- Argent & Asher
How to Verify if Yellow Gold Jewellery Is Real Gold
The most reliable method is simple: check the hallmark. UK hallmarking exists to protect buyers, and it’s the clearest indication of what you’re buying.
Other checks can help, but they’re not definitive on their own:
- Hallmark check: look for the purity mark (e.g., 375 / 585 / 750) plus assay office and sponsor’s mark.
- Magnet test: gold isn’t magnetic - if it sticks, something’s off. (If it doesn’t stick, that’s not a guarantee by itself.)
- Wear points: if colour changes at edges/links/clasps, you may be looking at plating.
- Professional testing: jewellers can confirm quickly with appropriate tools.
How to Distinguish Real Yellow Gold from Gold-Plated Items in Stores
Solid gold means gold throughout (as an alloy based on karat). Plated means a thin gold layer over another metal. They can look similar under bright shop lighting, so here’s what to look for fast:
- Tiny numbers: 585 or 750 (and ideally full UK hallmarking) indicate purity.
- Weight: gold is dense - solid pieces often feel more substantial.
- Colour behaviour: plated items can look overly bright yellow, then fade unevenly with wear.
- Price: if it’s extremely cheap, it usually isn’t solid gold.
If you’re unsure, ask the seller directly: “Is this solid gold or plated?” A reputable jeweller will answer clearly.
What Hallmark Stamps Confirm Yellow Gold Is Real in UK Jewellery?
UK hallmarks are a buyer protection system confirming the metal and purity. Common gold purity marks include:
- 999 (24ct)
- 750 (18ct)
- 585 (14ct)
- 375 (9ct)
Beyond the purity mark, full hallmarking typically includes an assay office mark and a sponsor’s mark. Together, these are strong signals of authenticity for UK buyers.
Are There Reputable Online Stores Selling Genuine Yellow Gold Pieces?
Yes - but you’ll want clear, specific information. Trustworthy jewellers are upfront about:
- Exact karat (9ct / 14ct / 18ct) and gold colour
- Whether the piece is solid gold (not plated)
- UK hallmarking
- Transparent pricing and aftercare support
At Argent & Asher, we focus on solid 14k and 18k gold and put transparency at the centre, so you can buy with confidence.
What Percentage of Pure Gold Is in 9ct Yellow Gold?
9ct yellow gold is 37.5% pure gold. It’s still real gold - it simply contains a higher proportion of other metals for strength and affordability.
| Karat | Purity Mark | Gold Content |
|---|---|---|
| 9ct | 375 | 37.5% |
| 14ct | 585 | 58.5% |
| 18ct | 750 | 75% |
| 24ct | 999 | 99.9% |
Yellow Gold vs Gold-Plated Jewellery
| Feature | Solid Yellow Gold | Gold-Plated Jewellery |
|---|---|---|
| Construction | Gold throughout (as an alloy) | Thin gold layer over another metal |
| Wear over time | Develops a gentle patina and can be polished | Layer can fade or wear unevenly |
| Long-term value | Holds value better | Limited resale value |
| Repairability | Often repairable and maintainable | More limited once plating is worn |
| Price | Higher upfront investment | More accessible upfront |
What Are the Best Products for Maintaining Yellow Gold Lustre?
You don’t need anything complicated. A small, consistent routine tends to do the most.
- A soft, lint-free cloth
- Mild, non-abrasive jewellery cleaner (optional)
- A soft toothbrush for detailed areas
Avoid harsh chemicals and abrasive pastes, especially if your jewellery includes gemstones.
How Do I Clean and Care for Yellow Gold Jewellery at Home?
Warm water, mild soap, gentle handling.
- Mix warm water with a small amount of mild dish soap.
- Soak jewellery for 10–15 minutes.
- Gently brush with a soft toothbrush (especially around settings).
- Rinse with clean water.
- Dry with a soft, lint-free cloth.
Chlorine and bleach can damage metals over time. If you wear a piece regularly, a simple clean every few months is usually plenty.
What to Do With Unwanted Yellow Gold
If your style has shifted, gold still holds value. Common options include:
- Sell: use a reputable buyer who understands karats and pays fairly.
- Repurpose: remake old pieces into something you’ll wear.
- Go bespoke: use the gold as part of a new custom design.
What Factors Determine the Market Value of Yellow Gold?
- Global market: gold prices move daily.
- Purity: karat/purity mark matters.
- Weight: grams on a scale.
- Design & craftsmanship: well-made pieces can carry premium value.
Image source- Argent & Asher
Conclusion
So, is yellow gold considered real gold? Yes - provided you’re buying authentic gold content (verified by hallmarking), not a plated imitation. Karats simply tell you how much gold is in the alloy, and that’s what helps you match purity to budget and lifestyle.
If you’re investing in a piece you want to wear for years, focus on hallmarking, clarity of materials, and jewellers who are transparent about what they make. That’s where confidence comes from.
FAQs
Is yellow gold real gold?
Yes. Yellow gold jewellery contains real gold, typically alloyed with other metals for strength.
Is 9ct yellow gold real gold?
Yes. 9ct gold is 37.5% pure gold (marked “375” in the UK), with the rest made up of other metals.
What hallmark should I look for on yellow gold in the UK?
Look for purity marks like 375 (9ct), 585 (14ct), or 750 (18ct), ideally as part of full UK hallmarking that includes assay office and sponsor’s marks.
How can I spot gold-plated jewellery?
Plated jewellery can wear unevenly over time, often showing a different metal underneath at edges, links, or high-contact points. Extremely low prices are also a common signal.
Can “750” or “18K” be faked?
Yes. Stamps can be copied, which is why UK hallmarking and reputable sellers matter so much.
