Gold is not represented by S, PT950 is platinum with 95% purity, and G999 is gold with 99.9% purity. SS may be a symbol of a small craftsman's family, or it may be printed by a laser printer to make this jewelry memorable. Silver is represented by S, but now silver is a general standard in the industry, stamped with "Zuyin" (common in brand physical stores), "Zuyin 990", "Zuyin 999" and "Zuyin 999.9". Except for a few old models and some handmade silver, the S standard of Zuyin has long been eliminated in the industry. Ss950 is not gold and silver. One may be the serial number or trademark of the manufacturer, and the other may indicate the clarity and color of the diamond. Whether you buy gold or silver, you should pay attention to avoid buying fakes.