TOUS Sweet Dolls heart necklace in rose silver vermeil. Heart size: 2.9 cm. Necklace length: 90 cm. Sterling silver plated with 18kt gold with a thickness of 3 to 5 microns and with no other metal between them. Production technique: Electroforming. Production technique: Electroforming with internal core made from resin that acts as a base, as well as giving the piece both stability and durability. Approximate weight of silver: 6 g. Approximate weight of the base: 2.2 g.