Gold Karat Explained: What Do 333, 585, 750 & 999 Actually Mean?

Luxurious gold jewelry collection on marble – rings, necklaces and bracelets in yellow and rose gold

How Gold Purity Is Measured

Pure gold (24 karat / 999 fineness) is too soft for everyday jewelry. To make it wearable, gold is alloyed with other metals. Purity is expressed in two ways: Karat (kt) — a 24-point scale where 24kt = pure gold; and Fineness — parts per 1,000 that are pure gold. Both describe the same thing differently.

The Key Gold Alloys

333 – 8 Karat (33.3% Gold)

The minimum to be called “gold” in Germany. Budget-friendly but more prone to tarnishing. Best for occasional-wear fashion pieces.

585 – 14 Karat (58.5% Gold)

Germany’s most popular alloy. The sweet spot between price, durability, and beauty. Available in yellow, white, and rose gold. Ideal for wedding rings, chains, and everyday jewelry.

750 – 18 Karat (75% Gold)

Rich color, luxurious feel. The preferred choice for fine jewelry with diamonds or precious stones. Slightly softer, allowing goldsmiths to craft intricate designs.

999 – 24 Karat (99.9% Gold)

Pure gold — too soft for jewelry. Best as investment bullion, bars, or commemorative coins.

Gold Colors Explained

  • Yellow Gold: The classic — alloyed with silver and copper
  • White Gold: Modern and cool — alloyed with palladium, often rhodium-plated
  • Rose Gold: Warm and romantic — higher copper content creates the pink hue

14k vs 18k: Which Should You Choose?

  • Choose 14k (585) for everyday wear — tougher and more affordable
  • Choose 18k (750) for special pieces, diamond rings, or if you want the richest color
  • Sensitive skin? 18k is less likely to cause reactions due to fewer base metals

Frequently Asked Questions

What does 585 gold mean?

585 gold contains 58.5% pure gold (14 karat). It’s the most popular gold alloy in Germany, offering a great balance of value, durability, and brilliance.

What is the best gold for everyday jewelry?

14 karat (585) is ideal — durable, scratch-resistant, and affordable. 18 karat (750) is recommended for special pieces with precious stones.

Does white gold turn yellow over time?

Yes — white gold’s rhodium plating wears off gradually. Re-plating at a jeweler (around €20–50) restores the look.