Instruction: Understanding Gold Purity
| Gold Carat | Low % range | High % range |
| 24k | 97.5 | 99.9 |
| 22k | 90 | 92.5 |
| 21k | 86.25 | 88.75 |
| 18k | 73.75 | 76.25 |
| 15k | 61.25 | 63.75 |
| 14k | 57.05 | 59.55 |
| 10k | 40.05 | 42.95 |
| 9k | 36.25 | 38.75 |
| Other metal in jewelry | ||
| Platinum | 900 | 950 |
| Silver | 825 | 925 |
Recognizing and understanding the basic value of gold purity hallmark on the product
24k solid gold can be seen on product mark as 24k, 24kt, or 980, .999 that meaning it contains 99% of pure gold.
22k solid gold can be seen on product mark as 22k, 22kt, or 916 that meaning it contains 90% of pure gold and other metals.
21k solid gold can be seen on product mark as 21k, 21kt, or 870, 875 that meaning it contains 87% of pure gold and other metals.
18k solid gold can be seen on product mark as 18k, 18kt, Au 750, or 750 that meaning it contains 75% of pure gold and other metals.
15k solid gold can be seen on product mark as 610 mostly all product mark as 610 come from Vietnam due to their cultural. It contains 61% of pure gold and other metals.
14k solid gold can be seen on product mark as 14k, 14kt, or 583, 585 that meaning it contains 58% of pure gold and other metals.
10k solid gold can be seen on product mark as 10k, 10kt, or 410, 416 that meaning it contains 41% of pure gold and other metals.
9k solid gold can be seen on product mark as 9k, 9kt, 9ct, or 0.375 mostly all these products are mark like this come from United Kingdom due to their cultural. It contains 37% of pure gold and other metals.
Other metal in jewelry
Platinum can be seen on product mark as platinum, ptn, or 900, 950 that meaning it contains 90 or 95% of platinum. The value of platinum is equivalent to 18k solid gold.
Silver can be seen on product mark as silver or 825, 925 that meaning it contains 92.5% of silver. The value of silver is not high-or rather, it is very low.
Additional: for some product does not show the hallmark because they are vintage, antiqued items, or second-hand items. Furthermore, these are items has been repaired or resized. Jewelers will know by testing the product. Currently, there have many smart devices used to accurately determine the percentage of pure gold.
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