18ct Gold Price Per Gram - £49.20 Live UK Rate
18ct gold price per gram UK is £49.20 today. Calculate the value of your 18 carat gold jewelry, engagement rings, and fine jewelry instantly.
Calculate 18ct Gold Value£49.20
per gram
75%
pure gold (750)
- • Engagement rings
- • Fine jewelry
- • Luxury watches
| Item | Typical Weight | Approximate Value |
|---|---|---|
| 18ct Engagement Ring | 4-8g | £196.80 - £393.60 |
| 18ct Gold Chain | 10-20g | £492 - £984 |
| 18ct Gold Bracelet | 15-30g | £738 - £1,476 |
| 18ct Wedding Band | 3-5g | £147.60 - £246 |
How to Identify 18ct Gold: Hallmarks & The 750 Mark
Understanding hallmarks ensures you're buying genuine 18 carat gold
750
Official 18ct Gold Mark
The hallmark 750 indicates that the gold is 75% pure (750 parts per 1,000), which is the definition of 18 carat gold. This mark is typically displayed in a rectangle with squared-off corners.
By UK law, British gold hallmarks must include the millesimal fineness mark (750 for 18ct) to verify authenticity.
Legitimate UK 18ct gold includes:
- •Fineness Mark: 750 or .750
- •Assay Office Mark: Symbol showing which UK assay office tested it (London, Birmingham, Edinburgh, or Sheffield)
- •Maker's Mark: Identifies the manufacturer or sponsor
- •Date Letter: Indicates year of manufacture (optional)
Many fake products are available with a sole "18k" or "18ct" stamp which are not genuine gold. These pieces are frequently produced from brass alloys and other metal mixtures.
Red Flags:
- ✗ Only "18k" or "18ct" stamp (no 750 mark)
- ✗ No assay office mark or maker's mark
- ✗ Poorly stamped or unclear markings
- ✗ Discoloration or green skin reaction
- ✗ Suspiciously low price
Authentic Signs:
- ✓ Clear 750 hallmark
- ✓ UK assay office symbol present
- ✓ Multiple hallmarks in sequence
- ✓ Consistent color throughout
- ✓ Price reflects genuine gold value
How to Verify 18ct Gold Authenticity
Look for clear hallmarks using a magnifying glass. The 750 mark should be sharp and well-defined, typically found on the inside of rings or clasps of necklaces.
Jewelers can perform acid tests or use electronic gold testers to verify purity. This is especially important for expensive pieces or if hallmarks are worn.
Gold is not magnetic. If a strong magnet attracts your "18ct gold," it's likely fake or heavily plated. However, clasps with steel springs may attract magnets.
Hypoallergenic Properties
With 75% pure gold content, 18ct gold is much less likely to cause skin reactions compared to 9ct gold (37.5% pure). The higher gold content means fewer allergenic metals in the alloy.
Rich, Warm Color
18ct gold has a distinctly richer, warmer golden hue compared to 9ct gold, which can appear paler. This luxurious color is highly prized for engagement rings and fine jewelry.
Better Value Retention
Higher gold content means 18ct gold retains value better than 9ct. It's easier to sell, trade, or melt down for its gold content. At £49.20 per gram, the intrinsic value is significantly higher.
Ideal for Intricate Designs
18ct gold's workability makes it perfect for hand-engraved pieces, filigree work, and detailed designs. It can be easily repaired, resized, or reworked by skilled jewelers.
18ct Gold Value Calculator
Calculate the value of your 18 carat gold instantly
Why 18ct Gold is Popular
18ct gold offers 75% pure gold content, giving it a rich, warm color while remaining durable enough for everyday wear. The 25% alloy metals (typically copper, silver, or palladium) add strength without compromising the gold's natural beauty.
18ct gold is the standard for engagement rings, wedding bands, and luxury watches because it won't tarnish, is hypoallergenic, and maintains its appearance over decades. It's pure enough to be valuable yet practical for daily wear.