18K Gold
75% pure gold — the European fine jewelry standard.
18 karat gold contains 18 parts gold out of 24 — 75% purity. It is the standard for fine jewelry across Europe, found in Swiss watches, engagement rings, and high-end pieces. It strikes the best balance of colour richness, gold content, and wearability.
18K gold at a glance
How 18K compares to other karats
| Karat | Purity | Hallmark | Colour | Durability | Best for |
|---|---|---|---|---|---|
| 24K | 99.9% | 999 | Bright yellow | Very soft | Bullion, investment, plating |
| 22K | 91.6% | 916 | Deep yellow | Soft | Bridal jewelry, South Asia |
| 18K ← | 75.0% | 750 | Rich yellow | Moderate | Fine jewelry, Europe standard |
| 14K | 58.5% | 585 | Warm yellow | Hard | Everyday rings, US standard |
| 10K | 41.7% | 417 | Pale yellow | Very hard | Budget jewelry, US market |
| 9K | 37.5% | 375 | Pale yellow | Very hard | UK, Ireland, Australia |
Who buys 18K gold — and why
Advantages of 18K
- Richest yellow colour of practical wearable gold
- European and global fine jewelry standard
- High gold content — better resale value than 14K
- Hypoallergenic enough for most sensitive skin
- Standard for luxury watches (Rolex, Cartier, Patek Philippe)
- Better colour for white gold — less yellow bleed-through
Disadvantages of 18K
- More expensive than 14K (same piece, ~30–35% higher price)
- Softer than 14K — scratches slightly more easily
- Prong settings may wear faster under heavy daily use
- Overkill for high-friction jewelry like sports bands
Frequently asked questions
Is 18K gold good for everyday jewelry?
18K gold is excellent for most everyday jewelry. It contains 75% pure gold with 25% alloy, giving it a rich yellow colour and good durability. It is the preferred standard for fine jewelry in Europe. It is more durable than 22K or 24K but slightly less hard than 14K — the tradeoff is a noticeably richer colour.
What does the 750 hallmark mean?
750 is the hallmark for 18K gold. It means 750 parts per thousand — 75% — of the alloy is pure gold. You will find 750 stamped on European fine jewelry, Swiss watches, and high-end pieces globally. It may appear as 750, 18K, 18Kt, or 18ct depending on country.
What is the difference between 18K and 14K gold?
18K contains 75% gold vs 58.5% in 14K. 18K has a noticeably warmer, richer yellow colour and higher intrinsic value. 14K is harder, more scratch-resistant, and significantly less expensive — typically 30–35% cheaper for the same piece.
Does 18K gold tarnish?
18K yellow gold does not tarnish in normal conditions — the 75% gold content resists oxidation. 18K white gold has rhodium plating that can wear off, revealing a slight yellowish tint — it can be replated. 18K rose gold does not tarnish but may deepen in colour over decades.