Composition and color of 18K rose gold
- **Gold content**: 18K indicates that gold makes up 75% (18/24) of the alloy, with the remaining 25% being other metals (such as copper, silver or zinc).
- **Rose Tone**: The addition of copper (usually 20-25% of the alloy) gives it a warm pink color, and silver or zinc is used to adjust the color and hardness.
Characteristics
- **Durability**: Harder than pure gold, suitable for daily wear, but color may fade with long-term exposure to sweat and chemicals.
- **Color Stability**: Rhodium-plated treatment enhances luster and resistance to tarnishing, but the plating needs to be re-treated when it wears off.