TK316 is short for TUSK Stainless Steel, which indicated that the jewelry will continue being stainless and you'll have no trouble cleansing it. There isn't a difference among the markings S925 and 925; the two designate that the product of jewellery is manufactured from sterling silver of the highest quality. https://archertbjsz.tinyblogging.com/the-best-side-of-jp88-80695306