It is internationally stipulated that all platinum ornaments should be marked with the word PT, such as PT990 ornaments or PT950 ornaments, PT900 ornaments, etc. Because the content of platinum is different, platinum ornaments with these words are real platinum ornaments, and those without these words are definitely not platinum ornaments.
1. foot platinum: mark "foot platinum" or "PT990". Refers to gold ornaments with platinum content of not less than 990 in thousands.
2.950 Platinum: marked with "Platinum 950" or "PT950". Refers to gold with a platinum content of not less than 950‰.
3.900 Platinum: Mark "Platinum 900" or "PT900". Refers to gold ornaments with a platinum content of not less than 900 in one thousandth proportion.
4.850 Platinum: Mark "Platinum 850" or "PT850". Refers to the gold ornaments with platinum content of not less than 850 in one thousandth proportion.
Extended data:
Precautions for purchasing platinum rings:
A precious metal similar to platinum jewelry is called palladium, which is easily confused with platinum. The metal imprint of palladium is PD, which is different from PT in platinum and will be followed by a number indicating the metal content, such as PD950. However, the two are not the same category, and the prices are also very different. Pay special attention when buying.
References:
People's Network-Do you really know the imprint of precious metal jewelry? 2