Yes TiffanyT's sunflower diamond-encrusted key necklace, with hollow design, is made of 925 sterling silver and plated with platinum, and the chain length can be matched with 40, 45, 50, 60 and 70 cm. Tiffany, the queen of jewelry, is famous for her diamonds and silver products, and is even more famous for the silver 925 jewelry of 185 1.