Real Solid 925 Sterling Silver Chain 6.5mm Hinge Twist Singapore Necklace 21.2''
18K Gold, Hallmark Au750, gold contents 750. Solid gold. 24K Gold 3D craft, gold contents 999 too. Stamped the standard hallmark in Chinese. 3D is unique craft, the inner part is hollow. Looks big, but weight light, enough strong.