Gold & Platinum
Gold
Gold is graded in purity called Karats, 24 Karat gold is pure gold, also known as fine gold with a purity of 99.9%. An 18 karat gold ring is 75% pure gold and 25% alloy; while a 14 karat gold ring is 58.5% pure gold and 41.5% alloy.
Hallmark
| Minimum Fine Gold Content | Gold Markings Purity | |
| 24K | 100% | 999 |
| 18K | 75% | 750 |
| 14K | 58.3% | 585 |
| 10K | 41.7% | 417 |
| 9K | 37.5% | 375 |
Gold Colors and Mixture
| Yellow Gold | Gold with Copper and Silver Alloys |
| White Gold | Gold Nickel, Zinc, silver |
| Green Gold | Gold with Silver, sometimes Copper and Zinc |
| Red Gold | Gold with Copper |
| Pink Gold | Gold with Copper |
Platinum
Platinum is silvery-white precious metal and is usually more expensive than gold. Most platinum jewelry is 95% platinum and 5% alloy. Platinum is heavier and more durable than gold with a slower wear factor.
