Gold karat chart
What the stamp means, and how much gold is in it
| Karat | Stamps | Gold | Pure gold in 10 g |
|---|---|---|---|
| 24K | 999 · 9999 | 99.9% | 9.99 g |
| 22K | 916 · 917 | 91.6% | 9.16 g |
| 21K | 875 | 87.5% | 8.75 g |
| 18K | 750 | 75% | 7.50 g |
| 16K | 667 · 666 | 66.7% | 6.67 g |
| 14K | 585 · 583 | 58.5% | 5.85 g |
| 12K | 500 | 50% | 5.00 g |
| 10K | 417 · 416 | 41.7% | 4.17 g |
| 9K | 375 · 9CT | 37.5% | 3.75 g |
Karat is parts of 24. The number stamp is the gold per thousand: 585 is 58.5%. A P after the karat (14KP) means plumb: solid gold, at least the karat stamped.
Not solid gold
- GF · 1/20 12K GF
- Gold filled: a karat gold layer, 1/20 of the weight, over base metal
- RGP
- Rolled gold plate: a thinner layer than gold filled
- GP · GEP
- Gold plated or electroplated: a thin coat
- HGE
- Heavy gold electroplate: a thicker coat, still plated
- Vermeil
- Gold over sterling silver: price as .925 silver
Silver
- 925 · STERLING
- Sterling silver, 92.5%
- 900 · COIN
- Coin silver, 90%
- 800
- 80% silver (European silverware)
- 950
- 95% silver (fine jewelry, Mexico). A 950 with PT or PD is platinum or palladium.
- 999 · FINE
- Fine silver, 99.9%
Platinum and palladium
- PT950 · PLAT
- Platinum, 95%
- PT900 · 900 PLAT
- Platinum, 90% (IRIDPLAT: 90% platinum, 10% iridium)
- PT850 · 850 PLAT
- Platinum, 85%
- PT999
- Fine platinum, 99.9%
- PD950
- Palladium, 95%
- PD500
- Palladium, 50%
Weights
- 1 troy ounce
- 31.1035 g · 20 dwt
- 1 pennyweight (dwt)
- 1.5552 g
- 1 gram
- 0.6430 dwt
- Gold value
- gold price ÷ 31.1035 × purity × grams