Karat Weight Division Precious Metals are measured in ounces by European Troy Standard.1 ounce (oz.) = 31.1003 grams
Purity Gold’s purity is measured in Karats which are used to in- dicate the percentage of gold. Pure 100% gold is 24 karat (24k) and is more expensive but not as durable as 18 karat (18k), which is 75% gold. Or even 14 karat (14k) measured at 58.3% of gold. The higher number of karats, the greater value in price.
| GOLD MARKS | American Marking Karat (k) | Pureness by Gold Percentage (%) | European Marking
| 9k | 37.5% | 375 | 10k | 41.7% | 417 | 12k | 50.0% | 500 | 14k | 58.3% | 585 | | | | 18k | 75.0% | 750 | | | | 20k | 83.0% | 833 | 21k | 87.5% | 875 | 22k | 91.6% | 916 | 24k | 100% | 999.9 | |