Platinum is platinum. In Cantonese, platinum is pronounced the same as white. What about those with the Pt logo? Can be divided into Pt950, Pt990, etc.
Now platinum is more than 500 yuan/gram, floating every day ~ this is only the unit price in the store, not counting the manual fee ~
Identification of platinum is very complicated and requires professional equipment. It's best to buy it in a chain store, and there will be a quality receipt certificate when you buy it. Is your platinum chain certified? Otherwise, take it for a new one, and it may be severely discounted ~