Using the serial numbers on the credit suisse gold can I find out the purity of the gold?

If your gold bullion is in bars or ingot form, they are certified to be .999 pure

Using the serial numbers on the credit suisse gold can I find out the purity of the gold?

All mine dor鑼?and scrap gold can be refined up to %26#039;999.9%26#039; (four-nines) purity, and as high as %26#039;999.99%26#039; (five- nines) purity, to meet specific industrial needs, such as electronic and fine jewelry manufacture.