NWT Efytal sterling silver 3 ring necklace 30th birthday gift 30th Birthday Gifts for Women, Sterling Silver 3 Circle Necklace for Her, Best Friend Birthday Gift, 3 Decade Jewelry 30 Years Old 30 MATERIALS: The chain and interlocking circles are made of 925 Sterling Silver. This necklace will not turn your skin green, red, or itchy - it's the real deal using sterling silver from a very reputable supplier. The chain is dainty but strong, and will not break on you.